You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@hbase.apache.org by mi...@apache.org on 2016/03/31 18:18:22 UTC
[20/51] [partial] hbase-site git commit: Published site at
d6fd85945130516ba10fe4854ce080e5a2329983.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/f8d69509/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/MetricsRegionServerWrapperImpl.html
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diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/MetricsRegionServerWrapperImpl.html b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/MetricsRegionServerWrapperImpl.html
index 63eee06..0144ded 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/MetricsRegionServerWrapperImpl.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/MetricsRegionServerWrapperImpl.html
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http://git-wip-us.apache.org/repos/asf/hbase-site/blob/f8d69509/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/wal/AbstractProtobufLogWriter.html
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diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/wal/AbstractProtobufLogWriter.html b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/wal/AbstractProtobufLogWriter.html
index a88fc05..029ef80 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/wal/AbstractProtobufLogWriter.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/wal/AbstractProtobufLogWriter.html
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+<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.util.ByteStringer;<a name="line.48"></a>
+<span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.util.EncryptionTest;<a name="line.49"></a>
+<span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.util.FSUtils;<a name="line.50"></a>
+<span class="sourceLineNo">051</span><a name="line.51"></a>
+<span class="sourceLineNo">052</span>/**<a name="line.52"></a>
+<span class="sourceLineNo">053</span> * Base class for Protobuf log writer.<a name="line.53"></a>
+<span class="sourceLineNo">054</span> */<a name="line.54"></a>
+<span class="sourceLineNo">055</span>@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.CONFIG)<a name="line.55"></a>
+<span class="sourceLineNo">056</span>public abstract class AbstractProtobufLogWriter {<a name="line.56"></a>
+<span class="sourceLineNo">057</span><a name="line.57"></a>
+<span class="sourceLineNo">058</span> private static final Log LOG = LogFactory.getLog(AbstractProtobufLogWriter.class);<a name="line.58"></a>
+<span class="sourceLineNo">059</span><a name="line.59"></a>
+<span class="sourceLineNo">060</span> protected CompressionContext compressionContext;<a name="line.60"></a>
+<span class="sourceLineNo">061</span> protected Configuration conf;<a name="line.61"></a>
+<span class="sourceLineNo">062</span> protected Codec.Encoder cellEncoder;<a name="line.62"></a>
+<span class="sourceLineNo">063</span> protected WALCellCodec.ByteStringCompressor compressor;<a name="line.63"></a>
+<span class="sourceLineNo">064</span> protected boolean trailerWritten;<a name="line.64"></a>
+<span class="sourceLineNo">065</span> protected WALTrailer trailer;<a name="line.65"></a>
+<span class="sourceLineNo">066</span> // maximum size of the wal Trailer in bytes. If a user writes/reads a trailer with size larger<a name="line.66"></a>
+<span class="sourceLineNo">067</span> // than this size, it is written/read respectively, with a WARN message in the log.<a name="line.67"></a>
+<span class="sourceLineNo">068</span> protected int trailerWarnSize;<a name="line.68"></a>
+<span class="sourceLineNo">069</span><a name="line.69"></a>
+<span class="sourceLineNo">070</span> protected AtomicLong length = new AtomicLong();<a name="line.70"></a>
+<span class="sourceLineNo">071</span><a name="line.71"></a>
+<span class="sourceLineNo">072</span> private WALCellCodec getCodec(Configuration conf, CompressionContext compressionContext)<a name="line.72"></a>
+<span class="sourceLineNo">073</span> throws IOException {<a name="line.73"></a>
+<span class="sourceLineNo">074</span> return WALCellCodec.create(conf, null, compressionContext);<a name="line.74"></a>
<span class="sourceLineNo">075</span> }<a name="line.75"></a>
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-<span class="sourceLineNo">077</span> private boolean initializeCompressionContext(Configuration conf, Path path) throws IOException {<a name="line.77"></a>
-<span class="sourceLineNo">078</span> boolean doCompress = conf.getBoolean(HConstants.ENABLE_WAL_COMPRESSION, false);<a name="line.78"></a>
-<span class="sourceLineNo">079</span> if (doCompress) {<a name="line.79"></a>
-<span class="sourceLineNo">080</span> try {<a name="line.80"></a>
-<span class="sourceLineNo">081</span> this.compressionContext = new CompressionContext(LRUDictionary.class,<a name="line.81"></a>
-<span class="sourceLineNo">082</span> FSUtils.isRecoveredEdits(path),<a name="line.82"></a>
-<span class="sourceLineNo">083</span> conf.getBoolean(CompressionContext.ENABLE_WAL_TAGS_COMPRESSION, true));<a name="line.83"></a>
-<span class="sourceLineNo">084</span> } catch (Exception e) {<a name="line.84"></a>
-<span class="sourceLineNo">085</span> throw new IOException("Failed to initiate CompressionContext", e);<a name="line.85"></a>
-<span class="sourceLineNo">086</span> }<a name="line.86"></a>
-<span class="sourceLineNo">087</span> }<a name="line.87"></a>
-<span class="sourceLineNo">088</span> return doCompress;<a name="line.88"></a>
-<span class="sourceLineNo">089</span> }<a name="line.89"></a>
-<span class="sourceLineNo">090</span><a name="line.90"></a>
-<span class="sourceLineNo">091</span> public void init(FileSystem fs, Path path, Configuration conf, boolean overwritable)<a name="line.91"></a>
-<span class="sourceLineNo">092</span> throws IOException {<a name="line.92"></a>
-<span class="sourceLineNo">093</span> this.conf = conf;<a name="line.93"></a>
-<span class="sourceLineNo">094</span> boolean doCompress = initializeCompressionContext(conf, path);<a name="line.94"></a>
-<span class="sourceLineNo">095</span> this.trailerWarnSize = conf.getInt(WAL_TRAILER_WARN_SIZE, DEFAULT_WAL_TRAILER_WARN_SIZE);<a name="line.95"></a>
-<span class="sourceLineNo">096</span> int bufferSize = FSUtils.getDefaultBufferSize(fs);<a name="line.96"></a>
-<span class="sourceLineNo">097</span> short replication = (short) conf.getInt("hbase.regionserver.hlog.replication",<a name="line.97"></a>
-<span class="sourceLineNo">098</span> FSUtils.getDefaultReplication(fs, path));<a name="line.98"></a>
-<span class="sourceLineNo">099</span> long blockSize = conf.getLong("hbase.regionserver.hlog.blocksize",<a name="line.99"></a>
-<span class="sourceLineNo">100</span> FSUtils.getDefaultBlockSize(fs, path));<a name="line.100"></a>
+<span class="sourceLineNo">077</span> private WALHeader buildWALHeader0(Configuration conf, WALHeader.Builder builder) {<a name="line.77"></a>
+<span class="sourceLineNo">078</span> if (!builder.hasWriterClsName()) {<a name="line.78"></a>
+<span class="sourceLineNo">079</span> builder.setWriterClsName(getWriterClassName());<a name="line.79"></a>
+<span class="sourceLineNo">080</span> }<a name="line.80"></a>
+<span class="sourceLineNo">081</span> if (!builder.hasCellCodecClsName()) {<a name="line.81"></a>
+<span class="sourceLineNo">082</span> builder.setCellCodecClsName(WALCellCodec.getWALCellCodecClass(conf));<a name="line.82"></a>
+<span class="sourceLineNo">083</span> }<a name="line.83"></a>
+<span class="sourceLineNo">084</span> return builder.build();<a name="line.84"></a>
+<span class="sourceLineNo">085</span> }<a name="line.85"></a>
+<span class="sourceLineNo">086</span><a name="line.86"></a>
+<span class="sourceLineNo">087</span> protected WALHeader buildWALHeader(Configuration conf, WALHeader.Builder builder)<a name="line.87"></a>
+<span class="sourceLineNo">088</span> throws IOException {<a name="line.88"></a>
+<span class="sourceLineNo">089</span> return buildWALHeader0(conf, builder);<a name="line.89"></a>
+<span class="sourceLineNo">090</span> }<a name="line.90"></a>
+<span class="sourceLineNo">091</span><a name="line.91"></a>
+<span class="sourceLineNo">092</span> // should be called in sub classes's buildWALHeader method to build WALHeader for secure<a name="line.92"></a>
+<span class="sourceLineNo">093</span> // environment. Do not forget to override the setEncryptor method as it will be called in this<a name="line.93"></a>
+<span class="sourceLineNo">094</span> // method to init your encryptor.<a name="line.94"></a>
+<span class="sourceLineNo">095</span> protected final WALHeader buildSecureWALHeader(Configuration conf, WALHeader.Builder builder)<a name="line.95"></a>
+<span class="sourceLineNo">096</span> throws IOException {<a name="line.96"></a>
+<span class="sourceLineNo">097</span> builder.setWriterClsName(getWriterClassName());<a name="line.97"></a>
+<span class="sourceLineNo">098</span> if (conf.getBoolean(HConstants.ENABLE_WAL_ENCRYPTION, false)) {<a name="line.98"></a>
+<span class="sourceLineNo">099</span> EncryptionTest.testKeyProvider(conf);<a name="line.99"></a>
+<span class="sourceLineNo">100</span> EncryptionTest.testCipherProvider(conf);<a name="line.100"></a>
<span class="sourceLineNo">101</span><a name="line.101"></a>
-<span class="sourceLineNo">102</span> initOutput(fs, path, overwritable, bufferSize, replication, blockSize);<a name="line.102"></a>
-<span class="sourceLineNo">103</span><a name="line.103"></a>
-<span class="sourceLineNo">104</span> boolean doTagCompress = doCompress<a name="line.104"></a>
-<span class="sourceLineNo">105</span> && conf.getBoolean(CompressionContext.ENABLE_WAL_TAGS_COMPRESSION, true);<a name="line.105"></a>
-<span class="sourceLineNo">106</span> length.set(writeMagicAndWALHeader(ProtobufLogReader.PB_WAL_MAGIC, buildWALHeader(conf,<a name="line.106"></a>
-<span class="sourceLineNo">107</span> WALHeader.newBuilder().setHasCompression(doCompress).setHasTagCompression(doTagCompress))));<a name="line.107"></a>
-<span class="sourceLineNo">108</span><a name="line.108"></a>
-<span class="sourceLineNo">109</span> initAfterHeader(doCompress);<a name="line.109"></a>
-<span class="sourceLineNo">110</span><a name="line.110"></a>
-<span class="sourceLineNo">111</span> // instantiate trailer to default value.<a name="line.111"></a>
-<span class="sourceLineNo">112</span> trailer = WALTrailer.newBuilder().build();<a name="line.112"></a>
-<span class="sourceLineNo">113</span> if (LOG.isTraceEnabled()) {<a name="line.113"></a>
-<span class="sourceLineNo">114</span> LOG.trace("Initialized protobuf WAL=" + path + ", compression=" + doCompress);<a name="line.114"></a>
-<span class="sourceLineNo">115</span> }<a name="line.115"></a>
-<span class="sourceLineNo">116</span> }<a name="line.116"></a>
-<span class="sourceLineNo">117</span><a name="line.117"></a>
-<span class="sourceLineNo">118</span> protected void initAfterHeader(boolean doCompress) throws IOException {<a name="line.118"></a>
-<span class="sourceLineNo">119</span> WALCellCodec codec = getCodec(conf, this.compressionContext);<a name="line.119"></a>
-<span class="sourceLineNo">120</span> this.cellEncoder = codec.getEncoder(getOutputStreamForCellEncoder());<a name="line.120"></a>
-<span class="sourceLineNo">121</span> if (doCompress) {<a name="line.121"></a>
-<span class="sourceLineNo">122</span> this.compressor = codec.getByteStringCompressor();<a name="line.122"></a>
-<span class="sourceLineNo">123</span> }<a name="line.123"></a>
-<span class="sourceLineNo">124</span> }<a name="line.124"></a>
-<span class="sourceLineNo">125</span><a name="line.125"></a>
-<span class="sourceLineNo">126</span> void setWALTrailer(WALTrailer walTrailer) {<a name="line.126"></a>
-<span class="sourceLineNo">127</span> this.trailer = walTrailer;<a name="line.127"></a>
-<span class="sourceLineNo">128</span> }<a name="line.128"></a>
-<span class="sourceLineNo">129</span><a name="line.129"></a>
-<span class="sourceLineNo">130</span> public long getLength() {<a name="line.130"></a>
-<span class="sourceLineNo">131</span> return length.get();<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> private WALTrailer buildWALTrailer(WALTrailer.Builder builder) {<a name="line.134"></a>
-<span class="sourceLineNo">135</span> return builder.build();<a name="line.135"></a>
-<span class="sourceLineNo">136</span> }<a name="line.136"></a>
-<span class="sourceLineNo">137</span><a name="line.137"></a>
-<span class="sourceLineNo">138</span> protected void writeWALTrailer() {<a name="line.138"></a>
-<span class="sourceLineNo">139</span> try {<a name="line.139"></a>
-<span class="sourceLineNo">140</span> int trailerSize = 0;<a name="line.140"></a>
-<span class="sourceLineNo">141</span> if (this.trailer == null) {<a name="line.141"></a>
-<span class="sourceLineNo">142</span> // use default trailer.<a name="line.142"></a>
-<span class="sourceLineNo">143</span> LOG.warn("WALTrailer is null. Continuing with default.");<a name="line.143"></a>
-<span class="sourceLineNo">144</span> this.trailer = buildWALTrailer(WALTrailer.newBuilder());<a name="line.144"></a>
-<span class="sourceLineNo">145</span> trailerSize = this.trailer.getSerializedSize();<a name="line.145"></a>
-<span class="sourceLineNo">146</span> } else if ((trailerSize = this.trailer.getSerializedSize()) > this.trailerWarnSize) {<a name="line.146"></a>
-<span class="sourceLineNo">147</span> // continue writing after warning the user.<a name="line.147"></a>
-<span class="sourceLineNo">148</span> LOG.warn("Please investigate WALTrailer usage. Trailer size > maximum size : " + trailerSize<a name="line.148"></a>
-<span class="sourceLineNo">149</span> + " > " + this.trailerWarnSize);<a name="line.149"></a>
+<span class="sourceLineNo">102</span> // Get an instance of our cipher<a name="line.102"></a>
+<span class="sourceLineNo">103</span> final String cipherName =<a name="line.103"></a>
+<span class="sourceLineNo">104</span> conf.get(HConstants.CRYPTO_WAL_ALGORITHM_CONF_KEY, HConstants.CIPHER_AES);<a name="line.104"></a>
+<span class="sourceLineNo">105</span> Cipher cipher = Encryption.getCipher(conf, cipherName);<a name="line.105"></a>
+<span class="sourceLineNo">106</span> if (cipher == null) {<a name="line.106"></a>
+<span class="sourceLineNo">107</span> throw new RuntimeException("Cipher '" + cipherName + "' is not available");<a name="line.107"></a>
+<span class="sourceLineNo">108</span> }<a name="line.108"></a>
+<span class="sourceLineNo">109</span><a name="line.109"></a>
+<span class="sourceLineNo">110</span> // Generate an encryption key for this WAL<a name="line.110"></a>
+<span class="sourceLineNo">111</span> SecureRandom rng = new SecureRandom();<a name="line.111"></a>
+<span class="sourceLineNo">112</span> byte[] keyBytes = new byte[cipher.getKeyLength()];<a name="line.112"></a>
+<span class="sourceLineNo">113</span> rng.nextBytes(keyBytes);<a name="line.113"></a>
+<span class="sourceLineNo">114</span> Key key = new SecretKeySpec(keyBytes, cipher.getName());<a name="line.114"></a>
+<span class="sourceLineNo">115</span> builder.setEncryptionKey(ByteStringer.wrap(EncryptionUtil.wrapKey(conf,<a name="line.115"></a>
+<span class="sourceLineNo">116</span> conf.get(HConstants.CRYPTO_WAL_KEY_NAME_CONF_KEY,<a name="line.116"></a>
+<span class="sourceLineNo">117</span> conf.get(HConstants.CRYPTO_MASTERKEY_NAME_CONF_KEY,<a name="line.117"></a>
+<span class="sourceLineNo">118</span> User.getCurrent().getShortName())),<a name="line.118"></a>
+<span class="sourceLineNo">119</span> key)));<a name="line.119"></a>
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+<span class="sourceLineNo">121</span> // Set up the encryptor<a name="line.121"></a>
+<span class="sourceLineNo">122</span> Encryptor encryptor = cipher.getEncryptor();<a name="line.122"></a>
+<span class="sourceLineNo">123</span> encryptor.setKey(key);<a name="line.123"></a>
+<span class="sourceLineNo">124</span> setEncryptor(encryptor);<a name="line.124"></a>
+<span class="sourceLineNo">125</span> if (LOG.isTraceEnabled()) {<a name="line.125"></a>
+<span class="sourceLineNo">126</span> LOG.trace("Initialized secure protobuf WAL: cipher=" + cipher.getName());<a name="line.126"></a>
+<span class="sourceLineNo">127</span> }<a name="line.127"></a>
+<span class="sourceLineNo">128</span> }<a name="line.128"></a>
+<span class="sourceLineNo">129</span> builder.setCellCodecClsName(SecureWALCellCodec.class.getName());<a name="line.129"></a>
+<span class="sourceLineNo">130</span> return buildWALHeader0(conf, builder);<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> // override this if you need a encryptor<a name="line.133"></a>
+<span class="sourceLineNo">134</span> protected void setEncryptor(Encryptor encryptor) {<a name="line.134"></a>
+<span class="sourceLineNo">135</span> }<a name="line.135"></a>
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+<span class="sourceLineNo">144</span> try {<a name="line.144"></a>
+<span class="sourceLineNo">145</span> this.compressionContext = new CompressionContext(LRUDictionary.class,<a name="line.145"></a>
+<span class="sourceLineNo">146</span> FSUtils.isRecoveredEdits(path),<a name="line.146"></a>
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+<span class="sourceLineNo">148</span> } catch (Exception e) {<a name="line.148"></a>
+<span class="sourceLineNo">149</span> throw new IOException("Failed to initiate CompressionContext", e);<a name="line.149"></a>
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-<span class="sourceLineNo">153</span> } catch (IOException ioe) {<a name="line.153"></a>
-<span class="sourceLineNo">154</span> LOG.warn("Failed to write trailer, non-fatal, continuing...", ioe);<a name="line.154"></a>
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-<span class="sourceLineNo">162</span> * return the file length after written.<a name="line.162"></a>
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+<span class="sourceLineNo">152</span> return doCompress;<a name="line.152"></a>
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+<span class="sourceLineNo">158</span> boolean doCompress = initializeCompressionContext(conf, path);<a name="line.158"></a>
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+<span class="sourceLineNo">160</span> int bufferSize = FSUtils.getDefaultBufferSize(fs);<a name="line.160"></a>
+<span class="sourceLineNo">161</span> short replication = (short) conf.getInt("hbase.regionserver.hlog.replication",<a name="line.161"></a>
+<span class="sourceLineNo">162</span> FSUtils.getDefaultReplication(fs, path));<a name="line.162"></a>
+<span class="sourceLineNo">163</span> long blockSize = conf.getLong("hbase.regionserver.hlog.blocksize",<a name="line.163"></a>
+<span class="sourceLineNo">164</span> FSUtils.getDefaultBlockSize(fs, path));<a name="line.164"></a>
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+<span class="sourceLineNo">166</span> initOutput(fs, path, overwritable, bufferSize, replication, blockSize);<a name="line.166"></a>
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+<span class="sourceLineNo">168</span> boolean doTagCompress = doCompress<a name="line.168"></a>
+<span class="sourceLineNo">169</span> && conf.getBoolean(CompressionContext.ENABLE_WAL_TAGS_COMPRESSION, true);<a name="line.169"></a>
+<span class="sourceLineNo">170</span> length.set(writeMagicAndWALHeader(ProtobufLogReader.PB_WAL_MAGIC, buildWALHeader(conf,<a name="line.170"></a>
+<span class="sourceLineNo">171</span> WALHeader.newBuilder().setHasCompression(doCompress).setHasTagCompression(doTagCompress))));<a name="line.171"></a>
+<span class="sourceLineNo">172</span><a name="line.172"></a>
+<span class="sourceLineNo">173</span> initAfterHeader(doCompress);<a name="line.173"></a>
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+<span class="sourceLineNo">175</span> // instantiate trailer to default value.<a name="line.175"></a>
+<span class="sourceLineNo">176</span> trailer = WALTrailer.newBuilder().build();<a name="line.176"></a>
+<span class="sourceLineNo">177</span> if (LOG.isTraceEnabled()) {<a name="line.177"></a>
+<span class="sourceLineNo">178</span> LOG.trace("Initialized protobuf WAL=" + path + ", compression=" + doCompress);<a name="line.178"></a>
+<span class="sourceLineNo">179</span> }<a name="line.179"></a>
+<span class="sourceLineNo">180</span> }<a name="line.180"></a>
+<span class="sourceLineNo">181</span><a name="line.181"></a>
+<span class="sourceLineNo">182</span> private void initAfterHeader0(boolean doCompress) throws IOException {<a name="line.182"></a>
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+<span class="sourceLineNo">184</span> this.cellEncoder = codec.getEncoder(getOutputStreamForCellEncoder());<a name="line.184"></a>
+<span class="sourceLineNo">185</span> if (doCompress) {<a name="line.185"></a>
+<span class="sourceLineNo">186</span> this.compressor = codec.getByteStringCompressor();<a name="line.186"></a>
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+<span class="sourceLineNo">188</span> }<a name="line.188"></a>
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+<span class="sourceLineNo">191</span> initAfterHeader0(doCompress);<a name="line.191"></a>
+<span class="sourceLineNo">192</span> }<a name="line.192"></a>
+<span class="sourceLineNo">193</span><a name="line.193"></a>
+<span class="sourceLineNo">194</span> // should be called in sub classes's initAfterHeader method to init SecureWALCellCodec.<a name="line.194"></a>
+<span class="sourceLineNo">195</span> protected final void secureInitAfterHeader(boolean doCompress, Encryptor encryptor)<a name="line.195"></a>
+<span class="sourceLineNo">196</span> throws IOException {<a name="line.196"></a>
+<span class="sourceLineNo">197</span> if (conf.getBoolean(HConstants.ENABLE_WAL_ENCRYPTION, false) && encryptor != null) {<a name="line.197"></a>
+<span class="sourceLineNo">198</span> WALCellCodec codec = SecureWALCellCodec.getCodec(this.conf, encryptor);<a name="line.198"></a>
+<span class="sourceLineNo">199</span> this.cellEncoder = codec.getEncoder(getOutputStreamForCellEncoder());<a name="line.199"></a>
+<span class="sourceLineNo">200</span> // We do not support compression<a name="line.200"></a>
+<span class="sourceLineNo">201</span> this.compressionContext = null;<a name="line.201"></a>
+<span class="sourceLineNo">202</span> } else {<a name="line.202"></a>
+<span class="sourceLineNo">203</span> initAfterHeader0(doCompress);<a name="line.203"></a>
+<span class="sourceLineNo">204</span> }<a name="line.204"></a>
+<span class="sourceLineNo">205</span> }<a name="line.205"></a>
+<span class="sourceLineNo">206</span><a name="line.206"></a>
+<span class="sourceLineNo">207</span> void setWALTrailer(WALTrailer walTrailer) {<a name="line.207"></a>
+<span class="sourceLineNo">208</span> this.trailer = walTrailer;<a name="line.208"></a>
+<span class="sourceLineNo">209</span> }<a name="line.209"></a>
+<span class="sourceLineNo">210</span><a name="line.210"></a>
+<span class="sourceLineNo">211</span> public long getLength() {<a name="line.211"></a>
+<span class="sourceLineNo">212</span> return length.get();<a name="line.212"></a>
+<span class="sourceLineNo">213</span> }<a name="line.213"></a>
+<span class="sourceLineNo">214</span><a name="line.214"></a>
+<span class="sourceLineNo">215</span> private WALTrailer buildWALTrailer(WALTrailer.Builder builder) {<a name="line.215"></a>
+<span class="sourceLineNo">216</span> return builder.build();<a name="line.216"></a>
+<span class="sourceLineNo">217</span> }<a name="line.217"></a>
+<span class="sourceLineNo">218</span><a name="line.218"></a>
+<span class="sourceLineNo">219</span> protected void writeWALTrailer() {<a name="line.219"></a>
+<span class="sourceLineNo">220</span> try {<a name="line.220"></a>
+<span class="sourceLineNo">221</span> int trailerSize = 0;<a name="line.221"></a>
+<span class="sourceLineNo">222</span> if (this.trailer == null) {<a name="line.222"></a>
+<span class="sourceLineNo">223</span> // use default trailer.<a name="line.223"></a>
+<span class="sourceLineNo">224</span> LOG.warn("WALTrailer is null. Continuing with default.");<a name="line.224"></a>
+<span class="sourceLineNo">225</span> this.trailer = buildWALTrailer(WALTrailer.newBuilder());<a name="line.225"></a>
+<span class="sourceLineNo">226</span> trailerSize = this.trailer.getSerializedSize();<a name="line.226"></a>
+<span class="sourceLineNo">227</span> } else if ((trailerSize = this.trailer.getSerializedSize()) > this.trailerWarnSize) {<a name="line.227"></a>
+<span class="sourceLineNo">228</span> // continue writing after warning the user.<a name="line.228"></a>
+<span class="sourceLineNo">229</span> LOG.warn("Please investigate WALTrailer usage. Trailer size > maximum size : " + trailerSize<a name="line.229"></a>
+<span class="sourceLineNo">230</span> + " > " + this.trailerWarnSize);<a name="line.230"></a>
+<span class="sourceLineNo">231</span> }<a name="line.231"></a>
+<span class="sourceLineNo">232</span> length.set(writeWALTrailerAndMagic(trailer, ProtobufLogReader.PB_WAL_COMPLETE_MAGIC));<a name="line.232"></a>
+<span class="sourceLineNo">233</span> this.trailerWritten = true;<a name="line.233"></a>
+<span class="sourceLineNo">234</span> } catch (IOException ioe) {<a name="line.234"></a>
+<span class="sourceLineNo">235</span> LOG.warn("Failed to write trailer, non-fatal, continuing...", ioe);<a name="line.235"></a>
+<span class="sourceLineNo">236</span> }<a name="line.236"></a>
+<span class="sourceLineNo">237</span> }<a name="line.237"></a>
+<span class="sourceLineNo">238</span><a name="line.238"></a>
+<span class="sourceLineNo">239</span> protected abstract void initOutput(FileSystem fs, Path path, boolean overwritable, int bufferSize,<a name="line.239"></a>
+<span class="sourceLineNo">240</span> short replication, long blockSize) throws IOException;<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> * return the file length after written.<a name="line.243"></a>
+<span class="sourceLineNo">244</span> */<a name="line.244"></a>
+<span class="sourceLineNo">245</span> protected abstract long writeMagicAndWALHeader(byte[] magic, WALHeader header) throws IOException;<a name="line.245"></a>
+<span class="sourceLineNo">246</span><a name="line.246"></a>
+<span class="sourceLineNo">247</span> protected abstract long writeWALTrailerAndMagic(WALTrailer trailer, byte[] magic)<a name="line.247"></a>
+<span class="sourceLineNo">248</span> throws IOException;<a name="line.248"></a>
+<span class="sourceLineNo">249</span><a name="line.249"></a>
+<span class="sourceLineNo">250</span> protected abstract OutputStream getOutputStreamForCellEncoder();<a name="line.250"></a>
+<span class="sourceLineNo">251</span>}<a name="line.251"></a>