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| <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> */<a name="line.17"></a> |
| <span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.master;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import java.io.IOException;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import org.apache.hadoop.hbase.TableName;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import org.apache.hadoop.hbase.client.TableState;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import org.apache.hadoop.hbase.client.TableState.State;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import org.apache.hadoop.hbase.zookeeper.ZKUtil;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.apache.hadoop.hbase.zookeeper.ZNodePaths;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.zookeeper.KeeperException;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.slf4j.Logger;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.slf4j.LoggerFactory;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span><a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ZooKeeperProtos;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span><a name="line.33"></a> |
| <span class="sourceLineNo">034</span>/**<a name="line.34"></a> |
| <span class="sourceLineNo">035</span> * A subclass of TableStateManager that mirrors change in state out to zookeeper for hbase-1.x<a name="line.35"></a> |
| <span class="sourceLineNo">036</span> * clients to pick up; hbase-1.x clients read table state of zookeeper rather than from hbase:meta<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> * as hbase-2.x clients do. Set "hbase.mirror.table.state.to.zookeeper" to false to disable<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> * mirroring. See in HMaster where we make the choice. The below does zk updates on a best-effort<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> * basis only. If we fail updating zk we keep going because only hbase1 clients suffer; we'll just<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> * log at WARN level.<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> * @deprecated Since 2.0.0. To be removed in 3.0.0.<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> */<a name="line.42"></a> |
| <span class="sourceLineNo">043</span>@Deprecated<a name="line.43"></a> |
| <span class="sourceLineNo">044</span>@InterfaceAudience.Private<a name="line.44"></a> |
| <span class="sourceLineNo">045</span>public class MirroringTableStateManager extends TableStateManager {<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> private static final Logger LOG = LoggerFactory.getLogger(MirroringTableStateManager.class);<a name="line.46"></a> |
| <span class="sourceLineNo">047</span><a name="line.47"></a> |
| <span class="sourceLineNo">048</span> /**<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> * Set this key to true in Configuration to enable mirroring of table state out to zookeeper so<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> * hbase-1.x clients can pick-up table state.<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> */<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> static final String MIRROR_TABLE_STATE_TO_ZK_KEY = "hbase.mirror.table.state.to.zookeeper";<a name="line.52"></a> |
| <span class="sourceLineNo">053</span><a name="line.53"></a> |
| <span class="sourceLineNo">054</span> public MirroringTableStateManager(MasterServices master) {<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> super(master);<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> }<a name="line.56"></a> |
| <span class="sourceLineNo">057</span><a name="line.57"></a> |
| <span class="sourceLineNo">058</span> @Override<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> protected void metaStateUpdated(TableName tableName, State newState) throws IOException {<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> updateZooKeeper(new TableState(tableName, newState));<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> }<a name="line.61"></a> |
| <span class="sourceLineNo">062</span><a name="line.62"></a> |
| <span class="sourceLineNo">063</span> @Override<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> protected void metaStateDeleted(TableName tableName) throws IOException {<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> deleteZooKeeper(tableName);<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> }<a name="line.66"></a> |
| <span class="sourceLineNo">067</span><a name="line.67"></a> |
| <span class="sourceLineNo">068</span> private void updateZooKeeper(TableState tableState) throws IOException {<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> if (tableState == null) {<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> return;<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> }<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> String znode = ZNodePaths.joinZNode(this.master.getZooKeeper().getZNodePaths().tableZNode,<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> tableState.getTableName().getNameAsString());<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> try {<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> // Make sure znode exists.<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> if (ZKUtil.checkExists(this.master.getZooKeeper(), znode) == -1) {<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> ZKUtil.createAndFailSilent(this.master.getZooKeeper(), znode);<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> }<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> // Now set newState<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> ZooKeeperProtos.DeprecatedTableState.Builder builder =<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> ZooKeeperProtos.DeprecatedTableState.newBuilder();<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> builder.setState(<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> ZooKeeperProtos.DeprecatedTableState.State.valueOf(tableState.getState().toString()));<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> byte[] data = ProtobufUtil.prependPBMagic(builder.build().toByteArray());<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> ZKUtil.setData(this.master.getZooKeeper(), znode, data);<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> } catch (KeeperException e) {<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> // Only hbase1 clients suffer if this fails.<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> LOG.warn("Failed setting table state to zookeeper mirrored for hbase-1.x clients", e);<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><a name="line.91"></a> |
| <span class="sourceLineNo">092</span> // This method is called by the super class on each row it finds in the hbase:meta table with<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> // table state in it.<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> @Override<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> protected void fixTableState(TableState tableState) throws IOException {<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> updateZooKeeper(tableState);<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> }<a name="line.97"></a> |
| <span class="sourceLineNo">098</span>}<a name="line.98"></a> |
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