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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.replication;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import java.io.ByteArrayOutputStream;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.io.IOException;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span><a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import org.apache.hadoop.conf.Configuration;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import org.apache.hadoop.hbase.zookeeper.ZKWatcher;<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><a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.hbase.thirdparty.com.google.protobuf.CodedOutputStream;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span><a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ReplicationProtos;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span><a name="line.32"></a> |
| <span class="sourceLineNo">033</span>/**<a name="line.33"></a> |
| <span class="sourceLineNo">034</span> * This is a base class for maintaining replication related data,for example, peer, queue, etc, in<a name="line.34"></a> |
| <span class="sourceLineNo">035</span> * zookeeper.<a name="line.35"></a> |
| <span class="sourceLineNo">036</span> */<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>@InterfaceAudience.Private<a name="line.37"></a> |
| <span class="sourceLineNo">038</span>public abstract class ZKReplicationStorageBase {<a name="line.38"></a> |
| <span class="sourceLineNo">039</span><a name="line.39"></a> |
| <span class="sourceLineNo">040</span> public static final String REPLICATION_ZNODE = "zookeeper.znode.replication";<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> public static final String REPLICATION_ZNODE_DEFAULT = "replication";<a name="line.41"></a> |
| <span class="sourceLineNo">042</span><a name="line.42"></a> |
| <span class="sourceLineNo">043</span> /** The name of the base znode that contains all replication state. */<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> protected final String replicationZNode;<a name="line.44"></a> |
| <span class="sourceLineNo">045</span><a name="line.45"></a> |
| <span class="sourceLineNo">046</span> protected final ZKWatcher zookeeper;<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> protected final Configuration conf;<a name="line.47"></a> |
| <span class="sourceLineNo">048</span><a name="line.48"></a> |
| <span class="sourceLineNo">049</span> protected ZKReplicationStorageBase(ZKWatcher zookeeper, Configuration conf) {<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> this.zookeeper = zookeeper;<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> this.conf = conf;<a name="line.51"></a> |
| <span class="sourceLineNo">052</span><a name="line.52"></a> |
| <span class="sourceLineNo">053</span> this.replicationZNode = ZNodePaths.joinZNode(this.zookeeper.getZNodePaths().baseZNode,<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> conf.get(REPLICATION_ZNODE, REPLICATION_ZNODE_DEFAULT));<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> }<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> * Serialized protobuf of <code>state</code> with pb magic prefix prepended suitable for use as<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> * content of a peer-state znode under a peer cluster id as in<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> * /hbase/replication/peers/PEER_ID/peer-state.<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> */<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> protected static byte[] toByteArray(final ReplicationProtos.ReplicationState.State state) {<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> ReplicationProtos.ReplicationState msg =<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> ReplicationProtos.ReplicationState.newBuilder().setState(state).build();<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> // There is no toByteArray on this pb Message?<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> // 32 bytes is default which seems fair enough here.<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> try (ByteArrayOutputStream baos = new ByteArrayOutputStream()) {<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> CodedOutputStream cos = CodedOutputStream.newInstance(baos, 16);<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> msg.writeTo(cos);<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> cos.flush();<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> baos.flush();<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> return ProtobufUtil.prependPBMagic(baos.toByteArray());<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> } catch (IOException e) {<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> throw new RuntimeException(e);<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> }<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> |
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