You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@hbase.apache.org by gi...@apache.org on 2018/05/24 14:48:26 UTC
[06/51] [partial] hbase-site git commit: Published site at
f3d1c021de2264301f68eadb9ef126ff83d7ef53.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/883dde2f/devapidocs/src-html/org/apache/hadoop/hbase/wal/WALFactory.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/wal/WALFactory.html b/devapidocs/src-html/org/apache/hadoop/hbase/wal/WALFactory.html
index 28539e5..c3f794b 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/wal/WALFactory.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/wal/WALFactory.html
@@ -55,404 +55,406 @@
<span class="sourceLineNo">047</span> * implementations:<a name="line.47"></a>
<span class="sourceLineNo">048</span> * <ul><a name="line.48"></a>
<span class="sourceLineNo">049</span> * <li><em>defaultProvider</em> : whatever provider is standard for the hbase version. Currently<a name="line.49"></a>
-<span class="sourceLineNo">050</span> * "filesystem"</li><a name="line.50"></a>
-<span class="sourceLineNo">051</span> * <li><em>filesystem</em> : a provider that will run on top of an implementation of the Hadoop<a name="line.51"></a>
-<span class="sourceLineNo">052</span> * FileSystem interface, normally HDFS.</li><a name="line.52"></a>
-<span class="sourceLineNo">053</span> * <li><em>multiwal</em> : a provider that will use multiple "filesystem" wal instances per region<a name="line.53"></a>
-<span class="sourceLineNo">054</span> * server.</li><a name="line.54"></a>
-<span class="sourceLineNo">055</span> * </ul><a name="line.55"></a>
-<span class="sourceLineNo">056</span> *<a name="line.56"></a>
-<span class="sourceLineNo">057</span> * Alternatively, you may provide a custom implementation of {@link WALProvider} by class name.<a name="line.57"></a>
-<span class="sourceLineNo">058</span> */<a name="line.58"></a>
-<span class="sourceLineNo">059</span>@InterfaceAudience.Private<a name="line.59"></a>
-<span class="sourceLineNo">060</span>public class WALFactory {<a name="line.60"></a>
-<span class="sourceLineNo">061</span><a name="line.61"></a>
-<span class="sourceLineNo">062</span> private static final Logger LOG = LoggerFactory.getLogger(WALFactory.class);<a name="line.62"></a>
+<span class="sourceLineNo">050</span> * "asyncfs"</li><a name="line.50"></a>
+<span class="sourceLineNo">051</span> * <li><em>asyncfs</em> : a provider that will run on top of an implementation of the Hadoop<a name="line.51"></a>
+<span class="sourceLineNo">052</span> * FileSystem interface via an asynchronous client.</li><a name="line.52"></a>
+<span class="sourceLineNo">053</span> * <li><em>filesystem</em> : a provider that will run on top of an implementation of the Hadoop<a name="line.53"></a>
+<span class="sourceLineNo">054</span> * FileSystem interface via HDFS's synchronous DFSClient.</li><a name="line.54"></a>
+<span class="sourceLineNo">055</span> * <li><em>multiwal</em> : a provider that will use multiple "filesystem" wal instances per region<a name="line.55"></a>
+<span class="sourceLineNo">056</span> * server.</li><a name="line.56"></a>
+<span class="sourceLineNo">057</span> * </ul><a name="line.57"></a>
+<span class="sourceLineNo">058</span> *<a name="line.58"></a>
+<span class="sourceLineNo">059</span> * Alternatively, you may provide a custom implementation of {@link WALProvider} by class name.<a name="line.59"></a>
+<span class="sourceLineNo">060</span> */<a name="line.60"></a>
+<span class="sourceLineNo">061</span>@InterfaceAudience.Private<a name="line.61"></a>
+<span class="sourceLineNo">062</span>public class WALFactory {<a name="line.62"></a>
<span class="sourceLineNo">063</span><a name="line.63"></a>
-<span class="sourceLineNo">064</span> /**<a name="line.64"></a>
-<span class="sourceLineNo">065</span> * Maps between configuration names for providers and implementation classes.<a name="line.65"></a>
-<span class="sourceLineNo">066</span> */<a name="line.66"></a>
-<span class="sourceLineNo">067</span> static enum Providers {<a name="line.67"></a>
-<span class="sourceLineNo">068</span> defaultProvider(AsyncFSWALProvider.class),<a name="line.68"></a>
-<span class="sourceLineNo">069</span> filesystem(FSHLogProvider.class),<a name="line.69"></a>
-<span class="sourceLineNo">070</span> multiwal(RegionGroupingProvider.class),<a name="line.70"></a>
-<span class="sourceLineNo">071</span> asyncfs(AsyncFSWALProvider.class);<a name="line.71"></a>
-<span class="sourceLineNo">072</span><a name="line.72"></a>
-<span class="sourceLineNo">073</span> final Class<? extends WALProvider> clazz;<a name="line.73"></a>
-<span class="sourceLineNo">074</span> Providers(Class<? extends WALProvider> clazz) {<a name="line.74"></a>
-<span class="sourceLineNo">075</span> this.clazz = clazz;<a name="line.75"></a>
-<span class="sourceLineNo">076</span> }<a name="line.76"></a>
-<span class="sourceLineNo">077</span> }<a name="line.77"></a>
-<span class="sourceLineNo">078</span><a name="line.78"></a>
-<span class="sourceLineNo">079</span> public static final String WAL_PROVIDER = "hbase.wal.provider";<a name="line.79"></a>
-<span class="sourceLineNo">080</span> static final String DEFAULT_WAL_PROVIDER = Providers.defaultProvider.name();<a name="line.80"></a>
-<span class="sourceLineNo">081</span><a name="line.81"></a>
-<span class="sourceLineNo">082</span> public static final String META_WAL_PROVIDER = "hbase.wal.meta_provider";<a name="line.82"></a>
-<span class="sourceLineNo">083</span> static final String DEFAULT_META_WAL_PROVIDER = Providers.defaultProvider.name();<a name="line.83"></a>
-<span class="sourceLineNo">084</span><a name="line.84"></a>
-<span class="sourceLineNo">085</span> final String factoryId;<a name="line.85"></a>
-<span class="sourceLineNo">086</span> private final WALProvider provider;<a name="line.86"></a>
-<span class="sourceLineNo">087</span> // The meta updates are written to a different wal. If this<a name="line.87"></a>
-<span class="sourceLineNo">088</span> // regionserver holds meta regions, then this ref will be non-null.<a name="line.88"></a>
-<span class="sourceLineNo">089</span> // lazily intialized; most RegionServers don't deal with META<a name="line.89"></a>
-<span class="sourceLineNo">090</span> private final AtomicReference<WALProvider> metaProvider = new AtomicReference<>();<a name="line.90"></a>
-<span class="sourceLineNo">091</span><a name="line.91"></a>
-<span class="sourceLineNo">092</span> /**<a name="line.92"></a>
-<span class="sourceLineNo">093</span> * Configuration-specified WAL Reader used when a custom reader is requested<a name="line.93"></a>
-<span class="sourceLineNo">094</span> */<a name="line.94"></a>
-<span class="sourceLineNo">095</span> private final Class<? extends AbstractFSWALProvider.Reader> logReaderClass;<a name="line.95"></a>
-<span class="sourceLineNo">096</span><a name="line.96"></a>
-<span class="sourceLineNo">097</span> /**<a name="line.97"></a>
-<span class="sourceLineNo">098</span> * How long to attempt opening in-recovery wals<a name="line.98"></a>
-<span class="sourceLineNo">099</span> */<a name="line.99"></a>
-<span class="sourceLineNo">100</span> private final int timeoutMillis;<a name="line.100"></a>
-<span class="sourceLineNo">101</span><a name="line.101"></a>
-<span class="sourceLineNo">102</span> private final Configuration conf;<a name="line.102"></a>
+<span class="sourceLineNo">064</span> private static final Logger LOG = LoggerFactory.getLogger(WALFactory.class);<a name="line.64"></a>
+<span class="sourceLineNo">065</span><a name="line.65"></a>
+<span class="sourceLineNo">066</span> /**<a name="line.66"></a>
+<span class="sourceLineNo">067</span> * Maps between configuration names for providers and implementation classes.<a name="line.67"></a>
+<span class="sourceLineNo">068</span> */<a name="line.68"></a>
+<span class="sourceLineNo">069</span> static enum Providers {<a name="line.69"></a>
+<span class="sourceLineNo">070</span> defaultProvider(AsyncFSWALProvider.class),<a name="line.70"></a>
+<span class="sourceLineNo">071</span> filesystem(FSHLogProvider.class),<a name="line.71"></a>
+<span class="sourceLineNo">072</span> multiwal(RegionGroupingProvider.class),<a name="line.72"></a>
+<span class="sourceLineNo">073</span> asyncfs(AsyncFSWALProvider.class);<a name="line.73"></a>
+<span class="sourceLineNo">074</span><a name="line.74"></a>
+<span class="sourceLineNo">075</span> final Class<? extends WALProvider> clazz;<a name="line.75"></a>
+<span class="sourceLineNo">076</span> Providers(Class<? extends WALProvider> clazz) {<a name="line.76"></a>
+<span class="sourceLineNo">077</span> this.clazz = clazz;<a name="line.77"></a>
+<span class="sourceLineNo">078</span> }<a name="line.78"></a>
+<span class="sourceLineNo">079</span> }<a name="line.79"></a>
+<span class="sourceLineNo">080</span><a name="line.80"></a>
+<span class="sourceLineNo">081</span> public static final String WAL_PROVIDER = "hbase.wal.provider";<a name="line.81"></a>
+<span class="sourceLineNo">082</span> static final String DEFAULT_WAL_PROVIDER = Providers.defaultProvider.name();<a name="line.82"></a>
+<span class="sourceLineNo">083</span><a name="line.83"></a>
+<span class="sourceLineNo">084</span> public static final String META_WAL_PROVIDER = "hbase.wal.meta_provider";<a name="line.84"></a>
+<span class="sourceLineNo">085</span> static final String DEFAULT_META_WAL_PROVIDER = Providers.defaultProvider.name();<a name="line.85"></a>
+<span class="sourceLineNo">086</span><a name="line.86"></a>
+<span class="sourceLineNo">087</span> final String factoryId;<a name="line.87"></a>
+<span class="sourceLineNo">088</span> private final WALProvider provider;<a name="line.88"></a>
+<span class="sourceLineNo">089</span> // The meta updates are written to a different wal. If this<a name="line.89"></a>
+<span class="sourceLineNo">090</span> // regionserver holds meta regions, then this ref will be non-null.<a name="line.90"></a>
+<span class="sourceLineNo">091</span> // lazily intialized; most RegionServers don't deal with META<a name="line.91"></a>
+<span class="sourceLineNo">092</span> private final AtomicReference<WALProvider> metaProvider = new AtomicReference<>();<a name="line.92"></a>
+<span class="sourceLineNo">093</span><a name="line.93"></a>
+<span class="sourceLineNo">094</span> /**<a name="line.94"></a>
+<span class="sourceLineNo">095</span> * Configuration-specified WAL Reader used when a custom reader is requested<a name="line.95"></a>
+<span class="sourceLineNo">096</span> */<a name="line.96"></a>
+<span class="sourceLineNo">097</span> private final Class<? extends AbstractFSWALProvider.Reader> logReaderClass;<a name="line.97"></a>
+<span class="sourceLineNo">098</span><a name="line.98"></a>
+<span class="sourceLineNo">099</span> /**<a name="line.99"></a>
+<span class="sourceLineNo">100</span> * How long to attempt opening in-recovery wals<a name="line.100"></a>
+<span class="sourceLineNo">101</span> */<a name="line.101"></a>
+<span class="sourceLineNo">102</span> private final int timeoutMillis;<a name="line.102"></a>
<span class="sourceLineNo">103</span><a name="line.103"></a>
-<span class="sourceLineNo">104</span> // Used for the singleton WALFactory, see below.<a name="line.104"></a>
-<span class="sourceLineNo">105</span> private WALFactory(Configuration conf) {<a name="line.105"></a>
-<span class="sourceLineNo">106</span> // this code is duplicated here so we can keep our members final.<a name="line.106"></a>
-<span class="sourceLineNo">107</span> // until we've moved reader/writer construction down into providers, this initialization must<a name="line.107"></a>
-<span class="sourceLineNo">108</span> // happen prior to provider initialization, in case they need to instantiate a reader/writer.<a name="line.108"></a>
-<span class="sourceLineNo">109</span> timeoutMillis = conf.getInt("hbase.hlog.open.timeout", 300000);<a name="line.109"></a>
-<span class="sourceLineNo">110</span> /* TODO Both of these are probably specific to the fs wal provider */<a name="line.110"></a>
-<span class="sourceLineNo">111</span> logReaderClass = conf.getClass("hbase.regionserver.hlog.reader.impl", ProtobufLogReader.class,<a name="line.111"></a>
-<span class="sourceLineNo">112</span> AbstractFSWALProvider.Reader.class);<a name="line.112"></a>
-<span class="sourceLineNo">113</span> this.conf = conf;<a name="line.113"></a>
-<span class="sourceLineNo">114</span> // end required early initialization<a name="line.114"></a>
-<span class="sourceLineNo">115</span><a name="line.115"></a>
-<span class="sourceLineNo">116</span> // this instance can't create wals, just reader/writers.<a name="line.116"></a>
-<span class="sourceLineNo">117</span> provider = null;<a name="line.117"></a>
-<span class="sourceLineNo">118</span> factoryId = SINGLETON_ID;<a name="line.118"></a>
-<span class="sourceLineNo">119</span> }<a name="line.119"></a>
-<span class="sourceLineNo">120</span><a name="line.120"></a>
-<span class="sourceLineNo">121</span> @VisibleForTesting<a name="line.121"></a>
-<span class="sourceLineNo">122</span> public Class<? extends WALProvider> getProviderClass(String key, String defaultValue) {<a name="line.122"></a>
-<span class="sourceLineNo">123</span> try {<a name="line.123"></a>
-<span class="sourceLineNo">124</span> return Providers.valueOf(conf.get(key, defaultValue)).clazz;<a name="line.124"></a>
-<span class="sourceLineNo">125</span> } catch (IllegalArgumentException exception) {<a name="line.125"></a>
-<span class="sourceLineNo">126</span> // Fall back to them specifying a class name<a name="line.126"></a>
-<span class="sourceLineNo">127</span> // Note that the passed default class shouldn't actually be used, since the above only fails<a name="line.127"></a>
-<span class="sourceLineNo">128</span> // when there is a config value present.<a name="line.128"></a>
-<span class="sourceLineNo">129</span> return conf.getClass(key, Providers.defaultProvider.clazz, WALProvider.class);<a name="line.129"></a>
-<span class="sourceLineNo">130</span> }<a name="line.130"></a>
-<span class="sourceLineNo">131</span> }<a name="line.131"></a>
-<span class="sourceLineNo">132</span><a name="line.132"></a>
-<span class="sourceLineNo">133</span> WALProvider createProvider(Class<? extends WALProvider> clazz, String providerId)<a name="line.133"></a>
-<span class="sourceLineNo">134</span> throws IOException {<a name="line.134"></a>
-<span class="sourceLineNo">135</span> LOG.info("Instantiating WALProvider of type " + clazz);<a name="line.135"></a>
-<span class="sourceLineNo">136</span> try {<a name="line.136"></a>
-<span class="sourceLineNo">137</span> final WALProvider result = clazz.getDeclaredConstructor().newInstance();<a name="line.137"></a>
-<span class="sourceLineNo">138</span> result.init(this, conf, providerId);<a name="line.138"></a>
-<span class="sourceLineNo">139</span> return result;<a name="line.139"></a>
-<span class="sourceLineNo">140</span> } catch (Exception e) {<a name="line.140"></a>
-<span class="sourceLineNo">141</span> LOG.error("couldn't set up WALProvider, the configured class is " + clazz);<a name="line.141"></a>
-<span class="sourceLineNo">142</span> LOG.debug("Exception details for failure to load WALProvider.", e);<a name="line.142"></a>
-<span class="sourceLineNo">143</span> throw new IOException("couldn't set up WALProvider", e);<a name="line.143"></a>
-<span class="sourceLineNo">144</span> }<a name="line.144"></a>
-<span class="sourceLineNo">145</span> }<a name="line.145"></a>
-<span class="sourceLineNo">146</span><a name="line.146"></a>
-<span class="sourceLineNo">147</span> /**<a name="line.147"></a>
-<span class="sourceLineNo">148</span> * instantiate a provider from a config property. requires conf to have already been set (as well<a name="line.148"></a>
-<span class="sourceLineNo">149</span> * as anything the provider might need to read).<a name="line.149"></a>
-<span class="sourceLineNo">150</span> */<a name="line.150"></a>
-<span class="sourceLineNo">151</span> WALProvider getProvider(String key, String defaultValue, String providerId) throws IOException {<a name="line.151"></a>
-<span class="sourceLineNo">152</span> Class<? extends WALProvider> clazz = getProviderClass(key, defaultValue);<a name="line.152"></a>
-<span class="sourceLineNo">153</span> WALProvider provider = createProvider(clazz, providerId);<a name="line.153"></a>
-<span class="sourceLineNo">154</span> provider.addWALActionsListener(new MetricsWAL());<a name="line.154"></a>
-<span class="sourceLineNo">155</span> return provider;<a name="line.155"></a>
-<span class="sourceLineNo">156</span> }<a name="line.156"></a>
-<span class="sourceLineNo">157</span><a name="line.157"></a>
-<span class="sourceLineNo">158</span> /**<a name="line.158"></a>
-<span class="sourceLineNo">159</span> * @param conf must not be null, will keep a reference to read params in later reader/writer<a name="line.159"></a>
-<span class="sourceLineNo">160</span> * instances.<a name="line.160"></a>
-<span class="sourceLineNo">161</span> * @param factoryId a unique identifier for this factory. used i.e. by filesystem implementations<a name="line.161"></a>
-<span class="sourceLineNo">162</span> * to make a directory<a name="line.162"></a>
-<span class="sourceLineNo">163</span> */<a name="line.163"></a>
-<span class="sourceLineNo">164</span> public WALFactory(Configuration conf, String factoryId) throws IOException {<a name="line.164"></a>
-<span class="sourceLineNo">165</span> // until we've moved reader/writer construction down into providers, this initialization must<a name="line.165"></a>
-<span class="sourceLineNo">166</span> // happen prior to provider initialization, in case they need to instantiate a reader/writer.<a name="line.166"></a>
-<span class="sourceLineNo">167</span> timeoutMillis = conf.getInt("hbase.hlog.open.timeout", 300000);<a name="line.167"></a>
-<span class="sourceLineNo">168</span> /* TODO Both of these are probably specific to the fs wal provider */<a name="line.168"></a>
-<span class="sourceLineNo">169</span> logReaderClass = conf.getClass("hbase.regionserver.hlog.reader.impl", ProtobufLogReader.class,<a name="line.169"></a>
-<span class="sourceLineNo">170</span> AbstractFSWALProvider.Reader.class);<a name="line.170"></a>
-<span class="sourceLineNo">171</span> this.conf = conf;<a name="line.171"></a>
-<span class="sourceLineNo">172</span> this.factoryId = factoryId;<a name="line.172"></a>
-<span class="sourceLineNo">173</span> // end required early initialization<a name="line.173"></a>
-<span class="sourceLineNo">174</span> if (conf.getBoolean("hbase.regionserver.hlog.enabled", true)) {<a name="line.174"></a>
-<span class="sourceLineNo">175</span> provider = getProvider(WAL_PROVIDER, DEFAULT_WAL_PROVIDER, null);<a name="line.175"></a>
-<span class="sourceLineNo">176</span> } else {<a name="line.176"></a>
-<span class="sourceLineNo">177</span> // special handling of existing configuration behavior.<a name="line.177"></a>
-<span class="sourceLineNo">178</span> LOG.warn("Running with WAL disabled.");<a name="line.178"></a>
-<span class="sourceLineNo">179</span> provider = new DisabledWALProvider();<a name="line.179"></a>
-<span class="sourceLineNo">180</span> provider.init(this, conf, factoryId);<a name="line.180"></a>
-<span class="sourceLineNo">181</span> }<a name="line.181"></a>
-<span class="sourceLineNo">182</span> }<a name="line.182"></a>
-<span class="sourceLineNo">183</span><a name="line.183"></a>
-<span class="sourceLineNo">184</span> /**<a name="line.184"></a>
-<span class="sourceLineNo">185</span> * Shutdown all WALs and clean up any underlying storage.<a name="line.185"></a>
-<span class="sourceLineNo">186</span> * Use only when you will not need to replay and edits that have gone to any wals from this<a name="line.186"></a>
-<span class="sourceLineNo">187</span> * factory.<a name="line.187"></a>
-<span class="sourceLineNo">188</span> */<a name="line.188"></a>
-<span class="sourceLineNo">189</span> public void close() throws IOException {<a name="line.189"></a>
-<span class="sourceLineNo">190</span> final WALProvider metaProvider = this.metaProvider.get();<a name="line.190"></a>
-<span class="sourceLineNo">191</span> if (null != metaProvider) {<a name="line.191"></a>
-<span class="sourceLineNo">192</span> metaProvider.close();<a name="line.192"></a>
-<span class="sourceLineNo">193</span> }<a name="line.193"></a>
-<span class="sourceLineNo">194</span> // close is called on a WALFactory with null provider in the case of contention handling<a name="line.194"></a>
-<span class="sourceLineNo">195</span> // within the getInstance method.<a name="line.195"></a>
-<span class="sourceLineNo">196</span> if (null != provider) {<a name="line.196"></a>
-<span class="sourceLineNo">197</span> provider.close();<a name="line.197"></a>
-<span class="sourceLineNo">198</span> }<a name="line.198"></a>
-<span class="sourceLineNo">199</span> }<a name="line.199"></a>
-<span class="sourceLineNo">200</span><a name="line.200"></a>
-<span class="sourceLineNo">201</span> /**<a name="line.201"></a>
-<span class="sourceLineNo">202</span> * Tell the underlying WAL providers to shut down, but do not clean up underlying storage.<a name="line.202"></a>
-<span class="sourceLineNo">203</span> * If you are not ending cleanly and will need to replay edits from this factory's wals,<a name="line.203"></a>
-<span class="sourceLineNo">204</span> * use this method if you can as it will try to leave things as tidy as possible.<a name="line.204"></a>
-<span class="sourceLineNo">205</span> */<a name="line.205"></a>
-<span class="sourceLineNo">206</span> public void shutdown() throws IOException {<a name="line.206"></a>
-<span class="sourceLineNo">207</span> IOException exception = null;<a name="line.207"></a>
-<span class="sourceLineNo">208</span> final WALProvider metaProvider = this.metaProvider.get();<a name="line.208"></a>
-<span class="sourceLineNo">209</span> if (null != metaProvider) {<a name="line.209"></a>
-<span class="sourceLineNo">210</span> try {<a name="line.210"></a>
-<span class="sourceLineNo">211</span> metaProvider.shutdown();<a name="line.211"></a>
-<span class="sourceLineNo">212</span> } catch(IOException ioe) {<a name="line.212"></a>
-<span class="sourceLineNo">213</span> exception = ioe;<a name="line.213"></a>
-<span class="sourceLineNo">214</span> }<a name="line.214"></a>
-<span class="sourceLineNo">215</span> }<a name="line.215"></a>
-<span class="sourceLineNo">216</span> provider.shutdown();<a name="line.216"></a>
-<span class="sourceLineNo">217</span> if (null != exception) {<a name="line.217"></a>
-<span class="sourceLineNo">218</span> throw exception;<a name="line.218"></a>
-<span class="sourceLineNo">219</span> }<a name="line.219"></a>
-<span class="sourceLineNo">220</span> }<a name="line.220"></a>
-<span class="sourceLineNo">221</span><a name="line.221"></a>
-<span class="sourceLineNo">222</span> public List<WAL> getWALs() {<a name="line.222"></a>
-<span class="sourceLineNo">223</span> return provider.getWALs();<a name="line.223"></a>
-<span class="sourceLineNo">224</span> }<a name="line.224"></a>
-<span class="sourceLineNo">225</span><a name="line.225"></a>
-<span class="sourceLineNo">226</span> private WALProvider getMetaProvider() throws IOException {<a name="line.226"></a>
-<span class="sourceLineNo">227</span> for (;;) {<a name="line.227"></a>
-<span class="sourceLineNo">228</span> WALProvider provider = this.metaProvider.get();<a name="line.228"></a>
-<span class="sourceLineNo">229</span> if (provider != null) {<a name="line.229"></a>
-<span class="sourceLineNo">230</span> return provider;<a name="line.230"></a>
-<span class="sourceLineNo">231</span> }<a name="line.231"></a>
-<span class="sourceLineNo">232</span> provider = getProvider(META_WAL_PROVIDER, DEFAULT_META_WAL_PROVIDER,<a name="line.232"></a>
-<span class="sourceLineNo">233</span> AbstractFSWALProvider.META_WAL_PROVIDER_ID);<a name="line.233"></a>
-<span class="sourceLineNo">234</span> if (metaProvider.compareAndSet(null, provider)) {<a name="line.234"></a>
-<span class="sourceLineNo">235</span> return provider;<a name="line.235"></a>
-<span class="sourceLineNo">236</span> } else {<a name="line.236"></a>
-<span class="sourceLineNo">237</span> // someone is ahead of us, close and try again.<a name="line.237"></a>
-<span class="sourceLineNo">238</span> provider.close();<a name="line.238"></a>
-<span class="sourceLineNo">239</span> }<a name="line.239"></a>
-<span class="sourceLineNo">240</span> }<a name="line.240"></a>
-<span class="sourceLineNo">241</span> }<a name="line.241"></a>
-<span class="sourceLineNo">242</span><a name="line.242"></a>
-<span class="sourceLineNo">243</span> /**<a name="line.243"></a>
-<span class="sourceLineNo">244</span> * @param region the region which we want to get a WAL for it. Could be null.<a name="line.244"></a>
-<span class="sourceLineNo">245</span> */<a name="line.245"></a>
-<span class="sourceLineNo">246</span> public WAL getWAL(RegionInfo region) throws IOException {<a name="line.246"></a>
-<span class="sourceLineNo">247</span> // use different WAL for hbase:meta<a name="line.247"></a>
-<span class="sourceLineNo">248</span> if (region != null && region.isMetaRegion() &&<a name="line.248"></a>
-<span class="sourceLineNo">249</span> region.getReplicaId() == RegionInfo.DEFAULT_REPLICA_ID) {<a name="line.249"></a>
-<span class="sourceLineNo">250</span> return getMetaProvider().getWAL(region);<a name="line.250"></a>
-<span class="sourceLineNo">251</span> } else {<a name="line.251"></a>
-<span class="sourceLineNo">252</span> return provider.getWAL(region);<a name="line.252"></a>
-<span class="sourceLineNo">253</span> }<a name="line.253"></a>
-<span class="sourceLineNo">254</span> }<a name="line.254"></a>
-<span class="sourceLineNo">255</span><a name="line.255"></a>
-<span class="sourceLineNo">256</span> public Reader createReader(final FileSystem fs, final Path path) throws IOException {<a name="line.256"></a>
-<span class="sourceLineNo">257</span> return createReader(fs, path, (CancelableProgressable)null);<a name="line.257"></a>
-<span class="sourceLineNo">258</span> }<a name="line.258"></a>
-<span class="sourceLineNo">259</span><a name="line.259"></a>
-<span class="sourceLineNo">260</span> /**<a name="line.260"></a>
-<span class="sourceLineNo">261</span> * Create a reader for the WAL. If you are reading from a file that's being written to and need<a name="line.261"></a>
-<span class="sourceLineNo">262</span> * to reopen it multiple times, use {@link WAL.Reader#reset()} instead of this method<a name="line.262"></a>
-<span class="sourceLineNo">263</span> * then just seek back to the last known good position.<a name="line.263"></a>
-<span class="sourceLineNo">264</span> * @return A WAL reader. Close when done with it.<a name="line.264"></a>
-<span class="sourceLineNo">265</span> * @throws IOException<a name="line.265"></a>
-<span class="sourceLineNo">266</span> */<a name="line.266"></a>
-<span class="sourceLineNo">267</span> public Reader createReader(final FileSystem fs, final Path path,<a name="line.267"></a>
-<span class="sourceLineNo">268</span> CancelableProgressable reporter) throws IOException {<a name="line.268"></a>
-<span class="sourceLineNo">269</span> return createReader(fs, path, reporter, true);<a name="line.269"></a>
-<span class="sourceLineNo">270</span> }<a name="line.270"></a>
-<span class="sourceLineNo">271</span><a name="line.271"></a>
-<span class="sourceLineNo">272</span> public Reader createReader(final FileSystem fs, final Path path, CancelableProgressable reporter,<a name="line.272"></a>
-<span class="sourceLineNo">273</span> boolean allowCustom) throws IOException {<a name="line.273"></a>
-<span class="sourceLineNo">274</span> Class<? extends AbstractFSWALProvider.Reader> lrClass =<a name="line.274"></a>
-<span class="sourceLineNo">275</span> allowCustom ? logReaderClass : ProtobufLogReader.class;<a name="line.275"></a>
-<span class="sourceLineNo">276</span> try {<a name="line.276"></a>
-<span class="sourceLineNo">277</span> // A wal file could be under recovery, so it may take several<a name="line.277"></a>
-<span class="sourceLineNo">278</span> // tries to get it open. Instead of claiming it is corrupted, retry<a name="line.278"></a>
-<span class="sourceLineNo">279</span> // to open it up to 5 minutes by default.<a name="line.279"></a>
-<span class="sourceLineNo">280</span> long startWaiting = EnvironmentEdgeManager.currentTime();<a name="line.280"></a>
-<span class="sourceLineNo">281</span> long openTimeout = timeoutMillis + startWaiting;<a name="line.281"></a>
-<span class="sourceLineNo">282</span> int nbAttempt = 0;<a name="line.282"></a>
-<span class="sourceLineNo">283</span> AbstractFSWALProvider.Reader reader = null;<a name="line.283"></a>
-<span class="sourceLineNo">284</span> while (true) {<a name="line.284"></a>
-<span class="sourceLineNo">285</span> try {<a name="line.285"></a>
-<span class="sourceLineNo">286</span> reader = lrClass.getDeclaredConstructor().newInstance();<a name="line.286"></a>
-<span class="sourceLineNo">287</span> reader.init(fs, path, conf, null);<a name="line.287"></a>
-<span class="sourceLineNo">288</span> return reader;<a name="line.288"></a>
-<span class="sourceLineNo">289</span> } catch (IOException e) {<a name="line.289"></a>
-<span class="sourceLineNo">290</span> if (reader != null) {<a name="line.290"></a>
-<span class="sourceLineNo">291</span> try {<a name="line.291"></a>
-<span class="sourceLineNo">292</span> reader.close();<a name="line.292"></a>
-<span class="sourceLineNo">293</span> } catch (IOException exception) {<a name="line.293"></a>
-<span class="sourceLineNo">294</span> LOG.warn("Could not close FSDataInputStream" + exception.getMessage());<a name="line.294"></a>
-<span class="sourceLineNo">295</span> LOG.debug("exception details", exception);<a name="line.295"></a>
-<span class="sourceLineNo">296</span> }<a name="line.296"></a>
-<span class="sourceLineNo">297</span> }<a name="line.297"></a>
-<span class="sourceLineNo">298</span><a name="line.298"></a>
-<span class="sourceLineNo">299</span> String msg = e.getMessage();<a name="line.299"></a>
-<span class="sourceLineNo">300</span> if (msg != null<a name="line.300"></a>
-<span class="sourceLineNo">301</span> && (msg.contains("Cannot obtain block length")<a name="line.301"></a>
-<span class="sourceLineNo">302</span> || msg.contains("Could not obtain the last block") || msg<a name="line.302"></a>
-<span class="sourceLineNo">303</span> .matches("Blocklist for [^ ]* has changed.*"))) {<a name="line.303"></a>
-<span class="sourceLineNo">304</span> if (++nbAttempt == 1) {<a name="line.304"></a>
-<span class="sourceLineNo">305</span> LOG.warn("Lease should have recovered. This is not expected. Will retry", e);<a name="line.305"></a>
-<span class="sourceLineNo">306</span> }<a name="line.306"></a>
-<span class="sourceLineNo">307</span> if (reporter != null && !reporter.progress()) {<a name="line.307"></a>
-<span class="sourceLineNo">308</span> throw new InterruptedIOException("Operation is cancelled");<a name="line.308"></a>
-<span class="sourceLineNo">309</span> }<a name="line.309"></a>
-<span class="sourceLineNo">310</span> if (nbAttempt > 2 && openTimeout < EnvironmentEdgeManager.currentTime()) {<a name="line.310"></a>
-<span class="sourceLineNo">311</span> LOG.error("Can't open after " + nbAttempt + " attempts and "<a name="line.311"></a>
-<span class="sourceLineNo">312</span> + (EnvironmentEdgeManager.currentTime() - startWaiting) + "ms " + " for " + path);<a name="line.312"></a>
-<span class="sourceLineNo">313</span> } else {<a name="line.313"></a>
-<span class="sourceLineNo">314</span> try {<a name="line.314"></a>
-<span class="sourceLineNo">315</span> Thread.sleep(nbAttempt < 3 ? 500 : 1000);<a name="line.315"></a>
-<span class="sourceLineNo">316</span> continue; // retry<a name="line.316"></a>
-<span class="sourceLineNo">317</span> } catch (InterruptedException ie) {<a name="line.317"></a>
-<span class="sourceLineNo">318</span> InterruptedIOException iioe = new InterruptedIOException();<a name="line.318"></a>
-<span class="sourceLineNo">319</span> iioe.initCause(ie);<a name="line.319"></a>
-<span class="sourceLineNo">320</span> throw iioe;<a name="line.320"></a>
-<span class="sourceLineNo">321</span> }<a name="line.321"></a>
-<span class="sourceLineNo">322</span> }<a name="line.322"></a>
-<span class="sourceLineNo">323</span> throw new LeaseNotRecoveredException(e);<a name="line.323"></a>
-<span class="sourceLineNo">324</span> } else {<a name="line.324"></a>
-<span class="sourceLineNo">325</span> throw e;<a name="line.325"></a>
-<span class="sourceLineNo">326</span> }<a name="line.326"></a>
-<span class="sourceLineNo">327</span> }<a name="line.327"></a>
-<span class="sourceLineNo">328</span> }<a name="line.328"></a>
-<span class="sourceLineNo">329</span> } catch (IOException ie) {<a name="line.329"></a>
-<span class="sourceLineNo">330</span> throw ie;<a name="line.330"></a>
-<span class="sourceLineNo">331</span> } catch (Exception e) {<a name="line.331"></a>
-<span class="sourceLineNo">332</span> throw new IOException("Cannot get log reader", e);<a name="line.332"></a>
-<span class="sourceLineNo">333</span> }<a name="line.333"></a>
-<span class="sourceLineNo">334</span> }<a name="line.334"></a>
-<span class="sourceLineNo">335</span><a name="line.335"></a>
-<span class="sourceLineNo">336</span> /**<a name="line.336"></a>
-<span class="sourceLineNo">337</span> * Create a writer for the WAL.<a name="line.337"></a>
-<span class="sourceLineNo">338</span> * Uses defaults.<a name="line.338"></a>
-<span class="sourceLineNo">339</span> * <p><a name="line.339"></a>
-<span class="sourceLineNo">340</span> * Should be package-private. public only for tests and<a name="line.340"></a>
-<span class="sourceLineNo">341</span> * {@link org.apache.hadoop.hbase.regionserver.wal.Compressor}<a name="line.341"></a>
-<span class="sourceLineNo">342</span> * @return A WAL writer. Close when done with it.<a name="line.342"></a>
-<span class="sourceLineNo">343</span> */<a name="line.343"></a>
-<span class="sourceLineNo">344</span> public Writer createWALWriter(final FileSystem fs, final Path path) throws IOException {<a name="line.344"></a>
-<span class="sourceLineNo">345</span> return FSHLogProvider.createWriter(conf, fs, path, false);<a name="line.345"></a>
-<span class="sourceLineNo">346</span> }<a name="line.346"></a>
-<span class="sourceLineNo">347</span><a name="line.347"></a>
-<span class="sourceLineNo">348</span> /**<a name="line.348"></a>
-<span class="sourceLineNo">349</span> * Should be package-private, visible for recovery testing.<a name="line.349"></a>
-<span class="sourceLineNo">350</span> * Uses defaults.<a name="line.350"></a>
-<span class="sourceLineNo">351</span> * @return an overwritable writer for recovered edits. caller should close.<a name="line.351"></a>
-<span class="sourceLineNo">352</span> */<a name="line.352"></a>
-<span class="sourceLineNo">353</span> @VisibleForTesting<a name="line.353"></a>
-<span class="sourceLineNo">354</span> public Writer createRecoveredEditsWriter(final FileSystem fs, final Path path)<a name="line.354"></a>
-<span class="sourceLineNo">355</span> throws IOException {<a name="line.355"></a>
-<span class="sourceLineNo">356</span> return FSHLogProvider.createWriter(conf, fs, path, true);<a name="line.356"></a>
-<span class="sourceLineNo">357</span> }<a name="line.357"></a>
-<span class="sourceLineNo">358</span><a name="line.358"></a>
-<span class="sourceLineNo">359</span> // These static methods are currently used where it's impractical to<a name="line.359"></a>
-<span class="sourceLineNo">360</span> // untangle the reliance on state in the filesystem. They rely on singleton<a name="line.360"></a>
-<span class="sourceLineNo">361</span> // WALFactory that just provides Reader / Writers.<a name="line.361"></a>
-<span class="sourceLineNo">362</span> // For now, first Configuration object wins. Practically this just impacts the reader/writer class<a name="line.362"></a>
-<span class="sourceLineNo">363</span> private static final AtomicReference<WALFactory> singleton = new AtomicReference<>();<a name="line.363"></a>
-<span class="sourceLineNo">364</span> private static final String SINGLETON_ID = WALFactory.class.getName();<a name="line.364"></a>
-<span class="sourceLineNo">365</span> <a name="line.365"></a>
-<span class="sourceLineNo">366</span> // Public only for FSHLog<a name="line.366"></a>
-<span class="sourceLineNo">367</span> public static WALFactory getInstance(Configuration configuration) {<a name="line.367"></a>
-<span class="sourceLineNo">368</span> WALFactory factory = singleton.get();<a name="line.368"></a>
-<span class="sourceLineNo">369</span> if (null == factory) {<a name="line.369"></a>
-<span class="sourceLineNo">370</span> WALFactory temp = new WALFactory(configuration);<a name="line.370"></a>
-<span class="sourceLineNo">371</span> if (singleton.compareAndSet(null, temp)) {<a name="line.371"></a>
-<span class="sourceLineNo">372</span> factory = temp;<a name="line.372"></a>
-<span class="sourceLineNo">373</span> } else {<a name="line.373"></a>
-<span class="sourceLineNo">374</span> // someone else beat us to initializing<a name="line.374"></a>
-<span class="sourceLineNo">375</span> try {<a name="line.375"></a>
-<span class="sourceLineNo">376</span> temp.close();<a name="line.376"></a>
-<span class="sourceLineNo">377</span> } catch (IOException exception) {<a name="line.377"></a>
-<span class="sourceLineNo">378</span> LOG.debug("failed to close temporary singleton. ignoring.", exception);<a name="line.378"></a>
-<span class="sourceLineNo">379</span> }<a name="line.379"></a>
-<span class="sourceLineNo">380</span> factory = singleton.get();<a name="line.380"></a>
-<span class="sourceLineNo">381</span> }<a name="line.381"></a>
-<span class="sourceLineNo">382</span> }<a name="line.382"></a>
-<span class="sourceLineNo">383</span> return factory;<a name="line.383"></a>
-<span class="sourceLineNo">384</span> }<a name="line.384"></a>
-<span class="sourceLineNo">385</span><a name="line.385"></a>
-<span class="sourceLineNo">386</span> /**<a name="line.386"></a>
-<span class="sourceLineNo">387</span> * Create a reader for the given path, accept custom reader classes from conf.<a name="line.387"></a>
-<span class="sourceLineNo">388</span> * If you already have a WALFactory, you should favor the instance method.<a name="line.388"></a>
-<span class="sourceLineNo">389</span> * @return a WAL Reader, caller must close.<a name="line.389"></a>
-<span class="sourceLineNo">390</span> */<a name="line.390"></a>
-<span class="sourceLineNo">391</span> public static Reader createReader(final FileSystem fs, final Path path,<a name="line.391"></a>
-<span class="sourceLineNo">392</span> final Configuration configuration) throws IOException {<a name="line.392"></a>
-<span class="sourceLineNo">393</span> return getInstance(configuration).createReader(fs, path);<a name="line.393"></a>
-<span class="sourceLineNo">394</span> }<a name="line.394"></a>
-<span class="sourceLineNo">395</span><a name="line.395"></a>
-<span class="sourceLineNo">396</span> /**<a name="line.396"></a>
-<span class="sourceLineNo">397</span> * Create a reader for the given path, accept custom reader classes from conf.<a name="line.397"></a>
-<span class="sourceLineNo">398</span> * If you already have a WALFactory, you should favor the instance method.<a name="line.398"></a>
-<span class="sourceLineNo">399</span> * @return a WAL Reader, caller must close.<a name="line.399"></a>
-<span class="sourceLineNo">400</span> */<a name="line.400"></a>
-<span class="sourceLineNo">401</span> static Reader createReader(final FileSystem fs, final Path path,<a name="line.401"></a>
-<span class="sourceLineNo">402</span> final Configuration configuration, final CancelableProgressable reporter) throws IOException {<a name="line.402"></a>
-<span class="sourceLineNo">403</span> return getInstance(configuration).createReader(fs, path, reporter);<a name="line.403"></a>
-<span class="sourceLineNo">404</span> }<a name="line.404"></a>
-<span class="sourceLineNo">405</span><a name="line.405"></a>
-<span class="sourceLineNo">406</span> /**<a name="line.406"></a>
-<span class="sourceLineNo">407</span> * Create a reader for the given path, ignore custom reader classes from conf.<a name="line.407"></a>
-<span class="sourceLineNo">408</span> * If you already have a WALFactory, you should favor the instance method.<a name="line.408"></a>
-<span class="sourceLineNo">409</span> * only public pending move of {@link org.apache.hadoop.hbase.regionserver.wal.Compressor}<a name="line.409"></a>
-<span class="sourceLineNo">410</span> * @return a WAL Reader, caller must close.<a name="line.410"></a>
-<span class="sourceLineNo">411</span> */<a name="line.411"></a>
-<span class="sourceLineNo">412</span> public static Reader createReaderIgnoreCustomClass(final FileSystem fs, final Path path,<a name="line.412"></a>
-<span class="sourceLineNo">413</span> final Configuration configuration) throws IOException {<a name="line.413"></a>
-<span class="sourceLineNo">414</span> return getInstance(configuration).createReader(fs, path, null, false);<a name="line.414"></a>
-<span class="sourceLineNo">415</span> }<a name="line.415"></a>
-<span class="sourceLineNo">416</span><a name="line.416"></a>
-<span class="sourceLineNo">417</span> /**<a name="line.417"></a>
-<span class="sourceLineNo">418</span> * If you already have a WALFactory, you should favor the instance method.<a name="line.418"></a>
-<span class="sourceLineNo">419</span> * Uses defaults.<a name="line.419"></a>
-<span class="sourceLineNo">420</span> * @return a Writer that will overwrite files. Caller must close.<a name="line.420"></a>
-<span class="sourceLineNo">421</span> */<a name="line.421"></a>
-<span class="sourceLineNo">422</span> static Writer createRecoveredEditsWriter(final FileSystem fs, final Path path,<a name="line.422"></a>
-<span class="sourceLineNo">423</span> final Configuration configuration)<a name="line.423"></a>
-<span class="sourceLineNo">424</span> throws IOException {<a name="line.424"></a>
-<span class="sourceLineNo">425</span> return FSHLogProvider.createWriter(configuration, fs, path, true);<a name="line.425"></a>
-<span class="sourceLineNo">426</span> }<a name="line.426"></a>
-<span class="sourceLineNo">427</span><a name="line.427"></a>
-<span class="sourceLineNo">428</span> /**<a name="line.428"></a>
-<span class="sourceLineNo">429</span> * If you already have a WALFactory, you should favor the instance method.<a name="line.429"></a>
-<span class="sourceLineNo">430</span> * Uses defaults.<a name="line.430"></a>
-<span class="sourceLineNo">431</span> * @return a writer that won't overwrite files. Caller must close.<a name="line.431"></a>
-<span class="sourceLineNo">432</span> */<a name="line.432"></a>
-<span class="sourceLineNo">433</span> @VisibleForTesting<a name="line.433"></a>
-<span class="sourceLineNo">434</span> public static Writer createWALWriter(final FileSystem fs, final Path path,<a name="line.434"></a>
-<span class="sourceLineNo">435</span> final Configuration configuration)<a name="line.435"></a>
-<span class="sourceLineNo">436</span> throws IOException {<a name="line.436"></a>
-<span class="sourceLineNo">437</span> return FSHLogProvider.createWriter(configuration, fs, path, false);<a name="line.437"></a>
-<span class="sourceLineNo">438</span> }<a name="line.438"></a>
-<span class="sourceLineNo">439</span><a name="line.439"></a>
-<span class="sourceLineNo">440</span> public final WALProvider getWALProvider() {<a name="line.440"></a>
-<span class="sourceLineNo">441</span> return this.provider;<a name="line.441"></a>
-<span class="sourceLineNo">442</span> }<a name="line.442"></a>
-<span class="sourceLineNo">443</span><a name="line.443"></a>
-<span class="sourceLineNo">444</span> public final WALProvider getMetaWALProvider() {<a name="line.444"></a>
-<span class="sourceLineNo">445</span> return this.metaProvider.get();<a name="line.445"></a>
-<span class="sourceLineNo">446</span> }<a name="line.446"></a>
-<span class="sourceLineNo">447</span>}<a name="line.447"></a>
+<span class="sourceLineNo">104</span> private final Configuration conf;<a name="line.104"></a>
+<span class="sourceLineNo">105</span><a name="line.105"></a>
+<span class="sourceLineNo">106</span> // Used for the singleton WALFactory, see below.<a name="line.106"></a>
+<span class="sourceLineNo">107</span> private WALFactory(Configuration conf) {<a name="line.107"></a>
+<span class="sourceLineNo">108</span> // this code is duplicated here so we can keep our members final.<a name="line.108"></a>
+<span class="sourceLineNo">109</span> // until we've moved reader/writer construction down into providers, this initialization must<a name="line.109"></a>
+<span class="sourceLineNo">110</span> // happen prior to provider initialization, in case they need to instantiate a reader/writer.<a name="line.110"></a>
+<span class="sourceLineNo">111</span> timeoutMillis = conf.getInt("hbase.hlog.open.timeout", 300000);<a name="line.111"></a>
+<span class="sourceLineNo">112</span> /* TODO Both of these are probably specific to the fs wal provider */<a name="line.112"></a>
+<span class="sourceLineNo">113</span> logReaderClass = conf.getClass("hbase.regionserver.hlog.reader.impl", ProtobufLogReader.class,<a name="line.113"></a>
+<span class="sourceLineNo">114</span> AbstractFSWALProvider.Reader.class);<a name="line.114"></a>
+<span class="sourceLineNo">115</span> this.conf = conf;<a name="line.115"></a>
+<span class="sourceLineNo">116</span> // end required early initialization<a name="line.116"></a>
+<span class="sourceLineNo">117</span><a name="line.117"></a>
+<span class="sourceLineNo">118</span> // this instance can't create wals, just reader/writers.<a name="line.118"></a>
+<span class="sourceLineNo">119</span> provider = null;<a name="line.119"></a>
+<span class="sourceLineNo">120</span> factoryId = SINGLETON_ID;<a name="line.120"></a>
+<span class="sourceLineNo">121</span> }<a name="line.121"></a>
+<span class="sourceLineNo">122</span><a name="line.122"></a>
+<span class="sourceLineNo">123</span> @VisibleForTesting<a name="line.123"></a>
+<span class="sourceLineNo">124</span> public Class<? extends WALProvider> getProviderClass(String key, String defaultValue) {<a name="line.124"></a>
+<span class="sourceLineNo">125</span> try {<a name="line.125"></a>
+<span class="sourceLineNo">126</span> return Providers.valueOf(conf.get(key, defaultValue)).clazz;<a name="line.126"></a>
+<span class="sourceLineNo">127</span> } catch (IllegalArgumentException exception) {<a name="line.127"></a>
+<span class="sourceLineNo">128</span> // Fall back to them specifying a class name<a name="line.128"></a>
+<span class="sourceLineNo">129</span> // Note that the passed default class shouldn't actually be used, since the above only fails<a name="line.129"></a>
+<span class="sourceLineNo">130</span> // when there is a config value present.<a name="line.130"></a>
+<span class="sourceLineNo">131</span> return conf.getClass(key, Providers.defaultProvider.clazz, WALProvider.class);<a name="line.131"></a>
+<span class="sourceLineNo">132</span> }<a name="line.132"></a>
+<span class="sourceLineNo">133</span> }<a name="line.133"></a>
+<span class="sourceLineNo">134</span><a name="line.134"></a>
+<span class="sourceLineNo">135</span> WALProvider createProvider(Class<? extends WALProvider> clazz, String providerId)<a name="line.135"></a>
+<span class="sourceLineNo">136</span> throws IOException {<a name="line.136"></a>
+<span class="sourceLineNo">137</span> LOG.info("Instantiating WALProvider of type " + clazz);<a name="line.137"></a>
+<span class="sourceLineNo">138</span> try {<a name="line.138"></a>
+<span class="sourceLineNo">139</span> final WALProvider result = clazz.getDeclaredConstructor().newInstance();<a name="line.139"></a>
+<span class="sourceLineNo">140</span> result.init(this, conf, providerId);<a name="line.140"></a>
+<span class="sourceLineNo">141</span> return result;<a name="line.141"></a>
+<span class="sourceLineNo">142</span> } catch (Exception e) {<a name="line.142"></a>
+<span class="sourceLineNo">143</span> LOG.error("couldn't set up WALProvider, the configured class is " + clazz);<a name="line.143"></a>
+<span class="sourceLineNo">144</span> LOG.debug("Exception details for failure to load WALProvider.", e);<a name="line.144"></a>
+<span class="sourceLineNo">145</span> throw new IOException("couldn't set up WALProvider", e);<a name="line.145"></a>
+<span class="sourceLineNo">146</span> }<a name="line.146"></a>
+<span class="sourceLineNo">147</span> }<a name="line.147"></a>
+<span class="sourceLineNo">148</span><a name="line.148"></a>
+<span class="sourceLineNo">149</span> /**<a name="line.149"></a>
+<span class="sourceLineNo">150</span> * instantiate a provider from a config property. requires conf to have already been set (as well<a name="line.150"></a>
+<span class="sourceLineNo">151</span> * as anything the provider might need to read).<a name="line.151"></a>
+<span class="sourceLineNo">152</span> */<a name="line.152"></a>
+<span class="sourceLineNo">153</span> WALProvider getProvider(String key, String defaultValue, String providerId) throws IOException {<a name="line.153"></a>
+<span class="sourceLineNo">154</span> Class<? extends WALProvider> clazz = getProviderClass(key, defaultValue);<a name="line.154"></a>
+<span class="sourceLineNo">155</span> WALProvider provider = createProvider(clazz, providerId);<a name="line.155"></a>
+<span class="sourceLineNo">156</span> provider.addWALActionsListener(new MetricsWAL());<a name="line.156"></a>
+<span class="sourceLineNo">157</span> return provider;<a name="line.157"></a>
+<span class="sourceLineNo">158</span> }<a name="line.158"></a>
+<span class="sourceLineNo">159</span><a name="line.159"></a>
+<span class="sourceLineNo">160</span> /**<a name="line.160"></a>
+<span class="sourceLineNo">161</span> * @param conf must not be null, will keep a reference to read params in later reader/writer<a name="line.161"></a>
+<span class="sourceLineNo">162</span> * instances.<a name="line.162"></a>
+<span class="sourceLineNo">163</span> * @param factoryId a unique identifier for this factory. used i.e. by filesystem implementations<a name="line.163"></a>
+<span class="sourceLineNo">164</span> * to make a directory<a name="line.164"></a>
+<span class="sourceLineNo">165</span> */<a name="line.165"></a>
+<span class="sourceLineNo">166</span> public WALFactory(Configuration conf, String factoryId) throws IOException {<a name="line.166"></a>
+<span class="sourceLineNo">167</span> // until we've moved reader/writer construction down into providers, this initialization must<a name="line.167"></a>
+<span class="sourceLineNo">168</span> // happen prior to provider initialization, in case they need to instantiate a reader/writer.<a name="line.168"></a>
+<span class="sourceLineNo">169</span> timeoutMillis = conf.getInt("hbase.hlog.open.timeout", 300000);<a name="line.169"></a>
+<span class="sourceLineNo">170</span> /* TODO Both of these are probably specific to the fs wal provider */<a name="line.170"></a>
+<span class="sourceLineNo">171</span> logReaderClass = conf.getClass("hbase.regionserver.hlog.reader.impl", ProtobufLogReader.class,<a name="line.171"></a>
+<span class="sourceLineNo">172</span> AbstractFSWALProvider.Reader.class);<a name="line.172"></a>
+<span class="sourceLineNo">173</span> this.conf = conf;<a name="line.173"></a>
+<span class="sourceLineNo">174</span> this.factoryId = factoryId;<a name="line.174"></a>
+<span class="sourceLineNo">175</span> // end required early initialization<a name="line.175"></a>
+<span class="sourceLineNo">176</span> if (conf.getBoolean("hbase.regionserver.hlog.enabled", true)) {<a name="line.176"></a>
+<span class="sourceLineNo">177</span> provider = getProvider(WAL_PROVIDER, DEFAULT_WAL_PROVIDER, null);<a name="line.177"></a>
+<span class="sourceLineNo">178</span> } else {<a name="line.178"></a>
+<span class="sourceLineNo">179</span> // special handling of existing configuration behavior.<a name="line.179"></a>
+<span class="sourceLineNo">180</span> LOG.warn("Running with WAL disabled.");<a name="line.180"></a>
+<span class="sourceLineNo">181</span> provider = new DisabledWALProvider();<a name="line.181"></a>
+<span class="sourceLineNo">182</span> provider.init(this, conf, factoryId);<a name="line.182"></a>
+<span class="sourceLineNo">183</span> }<a name="line.183"></a>
+<span class="sourceLineNo">184</span> }<a name="line.184"></a>
+<span class="sourceLineNo">185</span><a name="line.185"></a>
+<span class="sourceLineNo">186</span> /**<a name="line.186"></a>
+<span class="sourceLineNo">187</span> * Shutdown all WALs and clean up any underlying storage.<a name="line.187"></a>
+<span class="sourceLineNo">188</span> * Use only when you will not need to replay and edits that have gone to any wals from this<a name="line.188"></a>
+<span class="sourceLineNo">189</span> * factory.<a name="line.189"></a>
+<span class="sourceLineNo">190</span> */<a name="line.190"></a>
+<span class="sourceLineNo">191</span> public void close() throws IOException {<a name="line.191"></a>
+<span class="sourceLineNo">192</span> final WALProvider metaProvider = this.metaProvider.get();<a name="line.192"></a>
+<span class="sourceLineNo">193</span> if (null != metaProvider) {<a name="line.193"></a>
+<span class="sourceLineNo">194</span> metaProvider.close();<a name="line.194"></a>
+<span class="sourceLineNo">195</span> }<a name="line.195"></a>
+<span class="sourceLineNo">196</span> // close is called on a WALFactory with null provider in the case of contention handling<a name="line.196"></a>
+<span class="sourceLineNo">197</span> // within the getInstance method.<a name="line.197"></a>
+<span class="sourceLineNo">198</span> if (null != provider) {<a name="line.198"></a>
+<span class="sourceLineNo">199</span> provider.close();<a name="line.199"></a>
+<span class="sourceLineNo">200</span> }<a name="line.200"></a>
+<span class="sourceLineNo">201</span> }<a name="line.201"></a>
+<span class="sourceLineNo">202</span><a name="line.202"></a>
+<span class="sourceLineNo">203</span> /**<a name="line.203"></a>
+<span class="sourceLineNo">204</span> * Tell the underlying WAL providers to shut down, but do not clean up underlying storage.<a name="line.204"></a>
+<span class="sourceLineNo">205</span> * If you are not ending cleanly and will need to replay edits from this factory's wals,<a name="line.205"></a>
+<span class="sourceLineNo">206</span> * use this method if you can as it will try to leave things as tidy as possible.<a name="line.206"></a>
+<span class="sourceLineNo">207</span> */<a name="line.207"></a>
+<span class="sourceLineNo">208</span> public void shutdown() throws IOException {<a name="line.208"></a>
+<span class="sourceLineNo">209</span> IOException exception = null;<a name="line.209"></a>
+<span class="sourceLineNo">210</span> final WALProvider metaProvider = this.metaProvider.get();<a name="line.210"></a>
+<span class="sourceLineNo">211</span> if (null != metaProvider) {<a name="line.211"></a>
+<span class="sourceLineNo">212</span> try {<a name="line.212"></a>
+<span class="sourceLineNo">213</span> metaProvider.shutdown();<a name="line.213"></a>
+<span class="sourceLineNo">214</span> } catch(IOException ioe) {<a name="line.214"></a>
+<span class="sourceLineNo">215</span> exception = ioe;<a name="line.215"></a>
+<span class="sourceLineNo">216</span> }<a name="line.216"></a>
+<span class="sourceLineNo">217</span> }<a name="line.217"></a>
+<span class="sourceLineNo">218</span> provider.shutdown();<a name="line.218"></a>
+<span class="sourceLineNo">219</span> if (null != exception) {<a name="line.219"></a>
+<span class="sourceLineNo">220</span> throw exception;<a name="line.220"></a>
+<span class="sourceLineNo">221</span> }<a name="line.221"></a>
+<span class="sourceLineNo">222</span> }<a name="line.222"></a>
+<span class="sourceLineNo">223</span><a name="line.223"></a>
+<span class="sourceLineNo">224</span> public List<WAL> getWALs() {<a name="line.224"></a>
+<span class="sourceLineNo">225</span> return provider.getWALs();<a name="line.225"></a>
+<span class="sourceLineNo">226</span> }<a name="line.226"></a>
+<span class="sourceLineNo">227</span><a name="line.227"></a>
+<span class="sourceLineNo">228</span> private WALProvider getMetaProvider() throws IOException {<a name="line.228"></a>
+<span class="sourceLineNo">229</span> for (;;) {<a name="line.229"></a>
+<span class="sourceLineNo">230</span> WALProvider provider = this.metaProvider.get();<a name="line.230"></a>
+<span class="sourceLineNo">231</span> if (provider != null) {<a name="line.231"></a>
+<span class="sourceLineNo">232</span> return provider;<a name="line.232"></a>
+<span class="sourceLineNo">233</span> }<a name="line.233"></a>
+<span class="sourceLineNo">234</span> provider = getProvider(META_WAL_PROVIDER, DEFAULT_META_WAL_PROVIDER,<a name="line.234"></a>
+<span class="sourceLineNo">235</span> AbstractFSWALProvider.META_WAL_PROVIDER_ID);<a name="line.235"></a>
+<span class="sourceLineNo">236</span> if (metaProvider.compareAndSet(null, provider)) {<a name="line.236"></a>
+<span class="sourceLineNo">237</span> return provider;<a name="line.237"></a>
+<span class="sourceLineNo">238</span> } else {<a name="line.238"></a>
+<span class="sourceLineNo">239</span> // someone is ahead of us, close and try again.<a name="line.239"></a>
+<span class="sourceLineNo">240</span> provider.close();<a name="line.240"></a>
+<span class="sourceLineNo">241</span> }<a name="line.241"></a>
+<span class="sourceLineNo">242</span> }<a name="line.242"></a>
+<span class="sourceLineNo">243</span> }<a name="line.243"></a>
+<span class="sourceLineNo">244</span><a name="line.244"></a>
+<span class="sourceLineNo">245</span> /**<a name="line.245"></a>
+<span class="sourceLineNo">246</span> * @param region the region which we want to get a WAL for it. Could be null.<a name="line.246"></a>
+<span class="sourceLineNo">247</span> */<a name="line.247"></a>
+<span class="sourceLineNo">248</span> public WAL getWAL(RegionInfo region) throws IOException {<a name="line.248"></a>
+<span class="sourceLineNo">249</span> // use different WAL for hbase:meta<a name="line.249"></a>
+<span class="sourceLineNo">250</span> if (region != null && region.isMetaRegion() &&<a name="line.250"></a>
+<span class="sourceLineNo">251</span> region.getReplicaId() == RegionInfo.DEFAULT_REPLICA_ID) {<a name="line.251"></a>
+<span class="sourceLineNo">252</span> return getMetaProvider().getWAL(region);<a name="line.252"></a>
+<span class="sourceLineNo">253</span> } else {<a name="line.253"></a>
+<span class="sourceLineNo">254</span> return provider.getWAL(region);<a name="line.254"></a>
+<span class="sourceLineNo">255</span> }<a name="line.255"></a>
+<span class="sourceLineNo">256</span> }<a name="line.256"></a>
+<span class="sourceLineNo">257</span><a name="line.257"></a>
+<span class="sourceLineNo">258</span> public Reader createReader(final FileSystem fs, final Path path) throws IOException {<a name="line.258"></a>
+<span class="sourceLineNo">259</span> return createReader(fs, path, (CancelableProgressable)null);<a name="line.259"></a>
+<span class="sourceLineNo">260</span> }<a name="line.260"></a>
+<span class="sourceLineNo">261</span><a name="line.261"></a>
+<span class="sourceLineNo">262</span> /**<a name="line.262"></a>
+<span class="sourceLineNo">263</span> * Create a reader for the WAL. If you are reading from a file that's being written to and need<a name="line.263"></a>
+<span class="sourceLineNo">264</span> * to reopen it multiple times, use {@link WAL.Reader#reset()} instead of this method<a name="line.264"></a>
+<span class="sourceLineNo">265</span> * then just seek back to the last known good position.<a name="line.265"></a>
+<span class="sourceLineNo">266</span> * @return A WAL reader. Close when done with it.<a name="line.266"></a>
+<span class="sourceLineNo">267</span> * @throws IOException<a name="line.267"></a>
+<span class="sourceLineNo">268</span> */<a name="line.268"></a>
+<span class="sourceLineNo">269</span> public Reader createReader(final FileSystem fs, final Path path,<a name="line.269"></a>
+<span class="sourceLineNo">270</span> CancelableProgressable reporter) throws IOException {<a name="line.270"></a>
+<span class="sourceLineNo">271</span> return createReader(fs, path, reporter, true);<a name="line.271"></a>
+<span class="sourceLineNo">272</span> }<a name="line.272"></a>
+<span class="sourceLineNo">273</span><a name="line.273"></a>
+<span class="sourceLineNo">274</span> public Reader createReader(final FileSystem fs, final Path path, CancelableProgressable reporter,<a name="line.274"></a>
+<span class="sourceLineNo">275</span> boolean allowCustom) throws IOException {<a name="line.275"></a>
+<span class="sourceLineNo">276</span> Class<? extends AbstractFSWALProvider.Reader> lrClass =<a name="line.276"></a>
+<span class="sourceLineNo">277</span> allowCustom ? logReaderClass : ProtobufLogReader.class;<a name="line.277"></a>
+<span class="sourceLineNo">278</span> try {<a name="line.278"></a>
+<span class="sourceLineNo">279</span> // A wal file could be under recovery, so it may take several<a name="line.279"></a>
+<span class="sourceLineNo">280</span> // tries to get it open. Instead of claiming it is corrupted, retry<a name="line.280"></a>
+<span class="sourceLineNo">281</span> // to open it up to 5 minutes by default.<a name="line.281"></a>
+<span class="sourceLineNo">282</span> long startWaiting = EnvironmentEdgeManager.currentTime();<a name="line.282"></a>
+<span class="sourceLineNo">283</span> long openTimeout = timeoutMillis + startWaiting;<a name="line.283"></a>
+<span class="sourceLineNo">284</span> int nbAttempt = 0;<a name="line.284"></a>
+<span class="sourceLineNo">285</span> AbstractFSWALProvider.Reader reader = null;<a name="line.285"></a>
+<span class="sourceLineNo">286</span> while (true) {<a name="line.286"></a>
+<span class="sourceLineNo">287</span> try {<a name="line.287"></a>
+<span class="sourceLineNo">288</span> reader = lrClass.getDeclaredConstructor().newInstance();<a name="line.288"></a>
+<span class="sourceLineNo">289</span> reader.init(fs, path, conf, null);<a name="line.289"></a>
+<span class="sourceLineNo">290</span> return reader;<a name="line.290"></a>
+<span class="sourceLineNo">291</span> } catch (IOException e) {<a name="line.291"></a>
+<span class="sourceLineNo">292</span> if (reader != null) {<a name="line.292"></a>
+<span class="sourceLineNo">293</span> try {<a name="line.293"></a>
+<span class="sourceLineNo">294</span> reader.close();<a name="line.294"></a>
+<span class="sourceLineNo">295</span> } catch (IOException exception) {<a name="line.295"></a>
+<span class="sourceLineNo">296</span> LOG.warn("Could not close FSDataInputStream" + exception.getMessage());<a name="line.296"></a>
+<span class="sourceLineNo">297</span> LOG.debug("exception details", exception);<a name="line.297"></a>
+<span class="sourceLineNo">298</span> }<a name="line.298"></a>
+<span class="sourceLineNo">299</span> }<a name="line.299"></a>
+<span class="sourceLineNo">300</span><a name="line.300"></a>
+<span class="sourceLineNo">301</span> String msg = e.getMessage();<a name="line.301"></a>
+<span class="sourceLineNo">302</span> if (msg != null<a name="line.302"></a>
+<span class="sourceLineNo">303</span> && (msg.contains("Cannot obtain block length")<a name="line.303"></a>
+<span class="sourceLineNo">304</span> || msg.contains("Could not obtain the last block") || msg<a name="line.304"></a>
+<span class="sourceLineNo">305</span> .matches("Blocklist for [^ ]* has changed.*"))) {<a name="line.305"></a>
+<span class="sourceLineNo">306</span> if (++nbAttempt == 1) {<a name="line.306"></a>
+<span class="sourceLineNo">307</span> LOG.warn("Lease should have recovered. This is not expected. Will retry", e);<a name="line.307"></a>
+<span class="sourceLineNo">308</span> }<a name="line.308"></a>
+<span class="sourceLineNo">309</span> if (reporter != null && !reporter.progress()) {<a name="line.309"></a>
+<span class="sourceLineNo">310</span> throw new InterruptedIOException("Operation is cancelled");<a name="line.310"></a>
+<span class="sourceLineNo">311</span> }<a name="line.311"></a>
+<span class="sourceLineNo">312</span> if (nbAttempt > 2 && openTimeout < EnvironmentEdgeManager.currentTime()) {<a name="line.312"></a>
+<span class="sourceLineNo">313</span> LOG.error("Can't open after " + nbAttempt + " attempts and "<a name="line.313"></a>
+<span class="sourceLineNo">314</span> + (EnvironmentEdgeManager.currentTime() - startWaiting) + "ms " + " for " + path);<a name="line.314"></a>
+<span class="sourceLineNo">315</span> } else {<a name="line.315"></a>
+<span class="sourceLineNo">316</span> try {<a name="line.316"></a>
+<span class="sourceLineNo">317</span> Thread.sleep(nbAttempt < 3 ? 500 : 1000);<a name="line.317"></a>
+<span class="sourceLineNo">318</span> continue; // retry<a name="line.318"></a>
+<span class="sourceLineNo">319</span> } catch (InterruptedException ie) {<a name="line.319"></a>
+<span class="sourceLineNo">320</span> InterruptedIOException iioe = new InterruptedIOException();<a name="line.320"></a>
+<span class="sourceLineNo">321</span> iioe.initCause(ie);<a name="line.321"></a>
+<span class="sourceLineNo">322</span> throw iioe;<a name="line.322"></a>
+<span class="sourceLineNo">323</span> }<a name="line.323"></a>
+<span class="sourceLineNo">324</span> }<a name="line.324"></a>
+<span class="sourceLineNo">325</span> throw new LeaseNotRecoveredException(e);<a name="line.325"></a>
+<span class="sourceLineNo">326</span> } else {<a name="line.326"></a>
+<span class="sourceLineNo">327</span> throw e;<a name="line.327"></a>
+<span class="sourceLineNo">328</span> }<a name="line.328"></a>
+<span class="sourceLineNo">329</span> }<a name="line.329"></a>
+<span class="sourceLineNo">330</span> }<a name="line.330"></a>
+<span class="sourceLineNo">331</span> } catch (IOException ie) {<a name="line.331"></a>
+<span class="sourceLineNo">332</span> throw ie;<a name="line.332"></a>
+<span class="sourceLineNo">333</span> } catch (Exception e) {<a name="line.333"></a>
+<span class="sourceLineNo">334</span> throw new IOException("Cannot get log reader", e);<a name="line.334"></a>
+<span class="sourceLineNo">335</span> }<a name="line.335"></a>
+<span class="sourceLineNo">336</span> }<a name="line.336"></a>
+<span class="sourceLineNo">337</span><a name="line.337"></a>
+<span class="sourceLineNo">338</span> /**<a name="line.338"></a>
+<span class="sourceLineNo">339</span> * Create a writer for the WAL.<a name="line.339"></a>
+<span class="sourceLineNo">340</span> * Uses defaults.<a name="line.340"></a>
+<span class="sourceLineNo">341</span> * <p><a name="line.341"></a>
+<span class="sourceLineNo">342</span> * Should be package-private. public only for tests and<a name="line.342"></a>
+<span class="sourceLineNo">343</span> * {@link org.apache.hadoop.hbase.regionserver.wal.Compressor}<a name="line.343"></a>
+<span class="sourceLineNo">344</span> * @return A WAL writer. Close when done with it.<a name="line.344"></a>
+<span class="sourceLineNo">345</span> */<a name="line.345"></a>
+<span class="sourceLineNo">346</span> public Writer createWALWriter(final FileSystem fs, final Path path) throws IOException {<a name="line.346"></a>
+<span class="sourceLineNo">347</span> return FSHLogProvider.createWriter(conf, fs, path, false);<a name="line.347"></a>
+<span class="sourceLineNo">348</span> }<a name="line.348"></a>
+<span class="sourceLineNo">349</span><a name="line.349"></a>
+<span class="sourceLineNo">350</span> /**<a name="line.350"></a>
+<span class="sourceLineNo">351</span> * Should be package-private, visible for recovery testing.<a name="line.351"></a>
+<span class="sourceLineNo">352</span> * Uses defaults.<a name="line.352"></a>
+<span class="sourceLineNo">353</span> * @return an overwritable writer for recovered edits. caller should close.<a name="line.353"></a>
+<span class="sourceLineNo">354</span> */<a name="line.354"></a>
+<span class="sourceLineNo">355</span> @VisibleForTesting<a name="line.355"></a>
+<span class="sourceLineNo">356</span> public Writer createRecoveredEditsWriter(final FileSystem fs, final Path path)<a name="line.356"></a>
+<span class="sourceLineNo">357</span> throws IOException {<a name="line.357"></a>
+<span class="sourceLineNo">358</span> return FSHLogProvider.createWriter(conf, fs, path, true);<a name="line.358"></a>
+<span class="sourceLineNo">359</span> }<a name="line.359"></a>
+<span class="sourceLineNo">360</span><a name="line.360"></a>
+<span class="sourceLineNo">361</span> // These static methods are currently used where it's impractical to<a name="line.361"></a>
+<span class="sourceLineNo">362</span> // untangle the reliance on state in the filesystem. They rely on singleton<a name="line.362"></a>
+<span class="sourceLineNo">363</span> // WALFactory that just provides Reader / Writers.<a name="line.363"></a>
+<span class="sourceLineNo">364</span> // For now, first Configuration object wins. Practically this just impacts the reader/writer class<a name="line.364"></a>
+<span class="sourceLineNo">365</span> private static final AtomicReference<WALFactory> singleton = new AtomicReference<>();<a name="line.365"></a>
+<span class="sourceLineNo">366</span> private static final String SINGLETON_ID = WALFactory.class.getName();<a name="line.366"></a>
+<span class="sourceLineNo">367</span> <a name="line.367"></a>
+<span class="sourceLineNo">368</span> // Public only for FSHLog<a name="line.368"></a>
+<span class="sourceLineNo">369</span> public static WALFactory getInstance(Configuration configuration) {<a name="line.369"></a>
+<span class="sourceLineNo">370</span> WALFactory factory = singleton.get();<a name="line.370"></a>
+<span class="sourceLineNo">371</span> if (null == factory) {<a name="line.371"></a>
+<span class="sourceLineNo">372</span> WALFactory temp = new WALFactory(configuration);<a name="line.372"></a>
+<span class="sourceLineNo">373</span> if (singleton.compareAndSet(null, temp)) {<a name="line.373"></a>
+<span class="sourceLineNo">374</span> factory = temp;<a name="line.374"></a>
+<span class="sourceLineNo">375</span> } else {<a name="line.375"></a>
+<span class="sourceLineNo">376</span> // someone else beat us to initializing<a name="line.376"></a>
+<span class="sourceLineNo">377</span> try {<a name="line.377"></a>
+<span class="sourceLineNo">378</span> temp.close();<a name="line.378"></a>
+<span class="sourceLineNo">379</span> } catch (IOException exception) {<a name="line.379"></a>
+<span class="sourceLineNo">380</span> LOG.debug("failed to close temporary singleton. ignoring.", exception);<a name="line.380"></a>
+<span class="sourceLineNo">381</span> }<a name="line.381"></a>
+<span class="sourceLineNo">382</span> factory = singleton.get();<a name="line.382"></a>
+<span class="sourceLineNo">383</span> }<a name="line.383"></a>
+<span class="sourceLineNo">384</span> }<a name="line.384"></a>
+<span class="sourceLineNo">385</span> return factory;<a name="line.385"></a>
+<span class="sourceLineNo">386</span> }<a name="line.386"></a>
+<span class="sourceLineNo">387</span><a name="line.387"></a>
+<span class="sourceLineNo">388</span> /**<a name="line.388"></a>
+<span class="sourceLineNo">389</span> * Create a reader for the given path, accept custom reader classes from conf.<a name="line.389"></a>
+<span class="sourceLineNo">390</span> * If you already have a WALFactory, you should favor the instance method.<a name="line.390"></a>
+<span class="sourceLineNo">391</span> * @return a WAL Reader, caller must close.<a name="line.391"></a>
+<span class="sourceLineNo">392</span> */<a name="line.392"></a>
+<span class="sourceLineNo">393</span> public static Reader createReader(final FileSystem fs, final Path path,<a name="line.393"></a>
+<span class="sourceLineNo">394</span> final Configuration configuration) throws IOException {<a name="line.394"></a>
+<span class="sourceLineNo">395</span> return getInstance(configuration).createReader(fs, path);<a name="line.395"></a>
+<span class="sourceLineNo">396</span> }<a name="line.396"></a>
+<span class="sourceLineNo">397</span><a name="line.397"></a>
+<span class="sourceLineNo">398</span> /**<a name="line.398"></a>
+<span class="sourceLineNo">399</span> * Create a reader for the given path, accept custom reader classes from conf.<a name="line.399"></a>
+<span class="sourceLineNo">400</span> * If you already have a WALFactory, you should favor the instance method.<a name="line.400"></a>
+<span class="sourceLineNo">401</span> * @return a WAL Reader, caller must close.<a name="line.401"></a>
+<span class="sourceLineNo">402</span> */<a name="line.402"></a>
+<span class="sourceLineNo">403</span> static Reader createReader(final FileSystem fs, final Path path,<a name="line.403"></a>
+<span class="sourceLineNo">404</span> final Configuration configuration, final CancelableProgressable reporter) throws IOException {<a name="line.404"></a>
+<span class="sourceLineNo">405</span> return getInstance(configuration).createReader(fs, path, reporter);<a name="line.405"></a>
+<span class="sourceLineNo">406</span> }<a name="line.406"></a>
+<span class="sourceLineNo">407</span><a name="line.407"></a>
+<span class="sourceLineNo">408</span> /**<a name="line.408"></a>
+<span class="sourceLineNo">409</span> * Create a reader for the given path, ignore custom reader classes from conf.<a name="line.409"></a>
+<span class="sourceLineNo">410</span> * If you already have a WALFactory, you should favor the instance method.<a name="line.410"></a>
+<span class="sourceLineNo">411</span> * only public pending move of {@link org.apache.hadoop.hbase.regionserver.wal.Compressor}<a name="line.411"></a>
+<span class="sourceLineNo">412</span> * @return a WAL Reader, caller must close.<a name="line.412"></a>
+<span class="sourceLineNo">413</span> */<a name="line.413"></a>
+<span class="sourceLineNo">414</span> public static Reader createReaderIgnoreCustomClass(final FileSystem fs, final Path path,<a name="line.414"></a>
+<span class="sourceLineNo">415</span> final Configuration configuration) throws IOException {<a name="line.415"></a>
+<span class="sourceLineNo">416</span> return getInstance(configuration).createReader(fs, path, null, false);<a name="line.416"></a>
+<span class="sourceLineNo">417</span> }<a name="line.417"></a>
+<span class="sourceLineNo">418</span><a name="line.418"></a>
+<span class="sourceLineNo">419</span> /**<a name="line.419"></a>
+<span class="sourceLineNo">420</span> * If you already have a WALFactory, you should favor the instance method.<a name="line.420"></a>
+<span class="sourceLineNo">421</span> * Uses defaults.<a name="line.421"></a>
+<span class="sourceLineNo">422</span> * @return a Writer that will overwrite files. Caller must close.<a name="line.422"></a>
+<span class="sourceLineNo">423</span> */<a name="line.423"></a>
+<span class="sourceLineNo">424</span> static Writer createRecoveredEditsWriter(final FileSystem fs, final Path path,<a name="line.424"></a>
+<span class="sourceLineNo">425</span> final Configuration configuration)<a name="line.425"></a>
+<span class="sourceLineNo">426</span> throws IOException {<a name="line.426"></a>
+<span class="sourceLineNo">427</span> return FSHLogProvider.createWriter(configuration, fs, path, true);<a name="line.427"></a>
+<span class="sourceLineNo">428</span> }<a name="line.428"></a>
+<span class="sourceLineNo">429</span><a name="line.429"></a>
+<span class="sourceLineNo">430</span> /**<a name="line.430"></a>
+<span class="sourceLineNo">431</span> * If you already have a WALFactory, you should favor the instance method.<a name="line.431"></a>
+<span class="sourceLineNo">432</span> * Uses defaults.<a name="line.432"></a>
+<span class="sourceLineNo">433</span> * @return a writer that won't overwrite files. Caller must close.<a name="line.433"></a>
+<span class="sourceLineNo">434</span> */<a name="line.434"></a>
+<span class="sourceLineNo">435</span> @VisibleForTesting<a name="line.435"></a>
+<span class="sourceLineNo">436</span> public static Writer createWALWriter(final FileSystem fs, final Path path,<a name="line.436"></a>
+<span class="sourceLineNo">437</span> final Configuration configuration)<a name="line.437"></a>
+<span class="sourceLineNo">438</span> throws IOException {<a name="line.438"></a>
+<span class="sourceLineNo">439</span> return FSHLogProvider.createWriter(configuration, fs, path, false);<a name="line.439"></a>
+<span class="sourceLineNo">440</span> }<a name="line.440"></a>
+<span class="sourceLineNo">441</span><a name="line.441"></a>
+<span class="sourceLineNo">442</span> public final WALProvider getWALProvider() {<a name="line.442"></a>
+<span class="sourceLineNo">443</span> return this.provider;<a name="line.443"></a>
+<span class="sourceLineNo">444</span> }<a name="line.444"></a>
+<span class="sourceLineNo">445</span><a name="line.445"></a>
+<span class="sourceLineNo">446</span> public final WALProvider getMetaWALProvider() {<a name="line.446"></a>
+<span class="sourceLineNo">447</span> return this.metaProvider.get();<a name="line.447"></a>
+<span class="sourceLineNo">448</span> }<a name="line.448"></a>
+<span class="sourceLineNo">449</span>}<a name="line.449"></a>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/883dde2f/downloads.html
----------------------------------------------------------------------
diff --git a/downloads.html b/downloads.html
index 377d6b7..bbe098a 100644
--- a/downloads.html
+++ b/downloads.html
@@ -7,7 +7,7 @@
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
- <meta name="Date-Revision-yyyymmdd" content="20180523" />
+ <meta name="Date-Revision-yyyymmdd" content="20180524" />
<meta http-equiv="Content-Language" content="en" />
<title>Apache HBase – Apache HBase Downloads</title>
<link rel="stylesheet" href="./css/apache-maven-fluido-1.5-HBASE.min.css" />
@@ -366,7 +366,7 @@ under the License. -->
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
All rights reserved.
- <li id="publishDate" class="pull-right">Last Published: 2018-05-23</li>
+ <li id="publishDate" class="pull-right">Last Published: 2018-05-24</li>
</p>
</div>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/883dde2f/export_control.html
----------------------------------------------------------------------
diff --git a/export_control.html b/export_control.html
index 5729739..f197366 100644
--- a/export_control.html
+++ b/export_control.html
@@ -7,7 +7,7 @@
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
- <meta name="Date-Revision-yyyymmdd" content="20180523" />
+ <meta name="Date-Revision-yyyymmdd" content="20180524" />
<meta http-equiv="Content-Language" content="en" />
<title>Apache HBase –
Export Control
@@ -331,7 +331,7 @@ for more details.</p>
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
All rights reserved.
- <li id="publishDate" class="pull-right">Last Published: 2018-05-23</li>
+ <li id="publishDate" class="pull-right">Last Published: 2018-05-24</li>
</p>
</div>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/883dde2f/index.html
----------------------------------------------------------------------
diff --git a/index.html b/index.html
index 86cd1f0..5074c1c 100644
--- a/index.html
+++ b/index.html
@@ -7,7 +7,7 @@
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
- <meta name="Date-Revision-yyyymmdd" content="20180523" />
+ <meta name="Date-Revision-yyyymmdd" content="20180524" />
<meta http-equiv="Content-Language" content="en" />
<title>Apache HBase – Apache HBaseâ„¢ Home</title>
<link rel="stylesheet" href="./css/apache-maven-fluido-1.5-HBASE.min.css" />
@@ -411,7 +411,7 @@ Apache HBase is an open-source, distributed, versioned, non-relational database
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
All rights reserved.
- <li id="publishDate" class="pull-right">Last Published: 2018-05-23</li>
+ <li id="publishDate" class="pull-right">Last Published: 2018-05-24</li>
</p>
</div>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/883dde2f/integration.html
----------------------------------------------------------------------
diff --git a/integration.html b/integration.html
index d334deb..460f98e 100644
--- a/integration.html
+++ b/integration.html
@@ -7,7 +7,7 @@
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
- <meta name="Date-Revision-yyyymmdd" content="20180523" />
+ <meta name="Date-Revision-yyyymmdd" content="20180524" />
<meta http-equiv="Content-Language" content="en" />
<title>Apache HBase – CI Management</title>
<link rel="stylesheet" href="./css/apache-maven-fluido-1.5-HBASE.min.css" />
@@ -291,7 +291,7 @@
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
All rights reserved.
- <li id="publishDate" class="pull-right">Last Published: 2018-05-23</li>
+ <li id="publishDate" class="pull-right">Last Published: 2018-05-24</li>
</p>
</div>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/883dde2f/issue-tracking.html
----------------------------------------------------------------------
diff --git a/issue-tracking.html b/issue-tracking.html
index 299cb8c..1ff2dbf 100644
--- a/issue-tracking.html
+++ b/issue-tracking.html
@@ -7,7 +7,7 @@
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
- <meta name="Date-Revision-yyyymmdd" content="20180523" />
+ <meta name="Date-Revision-yyyymmdd" content="20180524" />
<meta http-equiv="Content-Language" content="en" />
<title>Apache HBase – Issue Management</title>
<link rel="stylesheet" href="./css/apache-maven-fluido-1.5-HBASE.min.css" />
@@ -288,7 +288,7 @@
<a href="https://www.apache.org/">The Apache Software Foundation</a>.
All rights reserved.
- <li id="publishDate" class="pull-right">Last Published: 2018-05-23</li>
+ <li id="publishDate" class="pull-right">Last Published: 2018-05-24</li>
</p>
</div>