[18/54] git commit: ACCUMULO-802 added TableNamespaceConfWatcher

[ct...@apache.org]

ACCUMULO-802 added TableNamespaceConfWatcher


Project: http://git-wip-us.apache.org/repos/asf/accumulo/repo
Commit: http://git-wip-us.apache.org/repos/asf/accumulo/commit/c9250dd6
Tree: http://git-wip-us.apache.org/repos/asf/accumulo/tree/c9250dd6
Diff: http://git-wip-us.apache.org/repos/asf/accumulo/diff/c9250dd6

Branch: refs/heads/ACCUMULO-802
Commit: c9250dd6be65e53c117d39d47d6ac6fc288f550c
Parents: 3e34db5
Author: Sean Hickey <ta...@gmail.com>
Authored: Fri Jul 26 11:35:45 2013 -0400
Committer: Christopher Tubbs <ct...@apache.org>
Committed: Thu Oct 31 21:25:35 2013 -0400

----------------------------------------------------------------------
 .../server/conf/TableNamespaceConfWatcher.java  | 107 +++++++++++++++++++
 1 file changed, 107 insertions(+)
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http://git-wip-us.apache.org/repos/asf/accumulo/blob/c9250dd6/server/src/main/java/org/apache/accumulo/server/conf/TableNamespaceConfWatcher.java
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diff --git a/server/src/main/java/org/apache/accumulo/server/conf/TableNamespaceConfWatcher.java b/server/src/main/java/org/apache/accumulo/server/conf/TableNamespaceConfWatcher.java
new file mode 100644
index 0000000..8bb33b8
--- /dev/null
+++ b/server/src/main/java/org/apache/accumulo/server/conf/TableNamespaceConfWatcher.java
@@ -0,0 +1,107 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.accumulo.server.conf;
+
+import org.apache.accumulo.core.Constants;
+import org.apache.accumulo.core.client.Instance;
+import org.apache.accumulo.core.zookeeper.ZooUtil;
+import org.apache.log4j.Level;
+import org.apache.log4j.Logger;
+import org.apache.zookeeper.WatchedEvent;
+import org.apache.zookeeper.Watcher;
+
+class TableNamespaceConfWatcher implements Watcher {
+  static {
+    Logger.getLogger("org.apache.zookeeper").setLevel(Level.WARN);
+    Logger.getLogger("org.apache.hadoop.io.compress").setLevel(Level.WARN);
+  }
+  
+  private static final Logger log = Logger.getLogger(TableNamespaceConfWatcher.class);
+  private Instance instance = null;
+  
+  TableNamespaceConfWatcher(Instance instance) {
+    this.instance = instance;
+  }
+  
+  @Override
+  public void process(WatchedEvent event) {
+    String path = event.getPath();
+    if (log.isTraceEnabled())
+      log.trace("WatchEvent : " + path + " " + event.getState() + " " + event.getType());
+    
+    String namespacesPrefix = ZooUtil.getRoot(instance) + Constants.ZNAMESPACES + "/";
+    
+    String namespaceId = null;
+    String key = null;
+    
+    if (path != null) {
+      if (path.startsWith(namespacesPrefix)) {
+        namespaceId = path.substring(namespacesPrefix.length());
+        if (namespaceId.contains("/")) {
+          namespaceId = namespaceId.substring(0, namespaceId.indexOf('/'));
+          if (path.startsWith(namespacesPrefix + namespaceId + Constants.ZNAMESPACE_CONF + "/"))
+            key = path.substring((namespacesPrefix + namespaceId + Constants.ZNAMESPACE_CONF + "/").length());
+        }
+      }
+      
+      if (namespaceId == null) {
+        log.warn("Zookeeper told me about a path I was not watching " + path + " state=" + event.getState() + " type=" + event.getType());
+        return;
+      }
+    }
+    
+    switch (event.getType()) {
+      case NodeDataChanged:
+        if (log.isTraceEnabled())
+          log.trace("EventNodeDataChanged " + event.getPath());
+        if (key != null)
+          ServerConfiguration.getTableNamespaceConfiguration(instance, namespaceId).propertyChanged(key);
+        break;
+      case NodeChildrenChanged:
+        ServerConfiguration.getTableNamespaceConfiguration(instance, namespaceId).propertiesChanged(key);
+        break;
+      case NodeDeleted:
+        if (key == null) {
+          ServerConfiguration.removeNamespaceIdInstance(namespaceId);
+        }
+        break;
+      case None:
+        switch (event.getState()) {
+          case Expired:
+            ServerConfiguration.expireAllTableObservers();
+            break;
+          case SyncConnected:
+            break;
+          case Disconnected:
+            break;
+          default:
+            log.warn("EventNone event not handled path = " + event.getPath() + " state=" + event.getState());
+        }
+        break;
+      case NodeCreated:
+        switch (event.getState()) {
+          case SyncConnected:
+            break;
+          default:
+            log.warn("Event NodeCreated event not handled path = " + event.getPath() + " state=" + event.getState());
+        }
+        break;
+      default:
+        log.warn("Event not handled path = " + event.getPath() + " state=" + event.getState() + " type = " + event.getType());
+    }
+  }
+}