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| <pre><span class="source-line-no">001</span><span id="line-1">/*</span> |
| <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span> |
| <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span> |
| <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span> |
| <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span> |
| <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span> |
| <span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span> |
| <span class="source-line-no">009</span><span id="line-9"> *</span> |
| <span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="source-line-no">011</span><span id="line-11"> *</span> |
| <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span> |
| <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span> |
| <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span> |
| <span class="source-line-no">017</span><span id="line-17"> */</span> |
| <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.replication;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import java.io.ByteArrayOutputStream;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.io.IOException;</span> |
| <span class="source-line-no">022</span><span id="line-22">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">023</span><span id="line-23">import org.apache.hadoop.hbase.zookeeper.ZKWatcher;</span> |
| <span class="source-line-no">024</span><span id="line-24">import org.apache.hadoop.hbase.zookeeper.ZNodePaths;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">026</span><span id="line-26"></span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hbase.thirdparty.com.google.protobuf.CodedOutputStream;</span> |
| <span class="source-line-no">028</span><span id="line-28"></span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.shaded.protobuf.generated.ReplicationProtos;</span> |
| <span class="source-line-no">031</span><span id="line-31"></span> |
| <span class="source-line-no">032</span><span id="line-32">/**</span> |
| <span class="source-line-no">033</span><span id="line-33"> * This is a base class for maintaining replication related data,for example, peer, queue, etc, in</span> |
| <span class="source-line-no">034</span><span id="line-34"> * zookeeper.</span> |
| <span class="source-line-no">035</span><span id="line-35"> */</span> |
| <span class="source-line-no">036</span><span id="line-36">@InterfaceAudience.Private</span> |
| <span class="source-line-no">037</span><span id="line-37">public abstract class ZKReplicationStorageBase {</span> |
| <span class="source-line-no">038</span><span id="line-38"></span> |
| <span class="source-line-no">039</span><span id="line-39"> public static final String REPLICATION_ZNODE = "zookeeper.znode.replication";</span> |
| <span class="source-line-no">040</span><span id="line-40"> public static final String REPLICATION_ZNODE_DEFAULT = "replication";</span> |
| <span class="source-line-no">041</span><span id="line-41"></span> |
| <span class="source-line-no">042</span><span id="line-42"> /** The name of the base znode that contains all replication state. */</span> |
| <span class="source-line-no">043</span><span id="line-43"> protected final String replicationZNode;</span> |
| <span class="source-line-no">044</span><span id="line-44"></span> |
| <span class="source-line-no">045</span><span id="line-45"> protected final ZKWatcher zookeeper;</span> |
| <span class="source-line-no">046</span><span id="line-46"> protected final Configuration conf;</span> |
| <span class="source-line-no">047</span><span id="line-47"></span> |
| <span class="source-line-no">048</span><span id="line-48"> protected ZKReplicationStorageBase(ZKWatcher zookeeper, Configuration conf) {</span> |
| <span class="source-line-no">049</span><span id="line-49"> this.zookeeper = zookeeper;</span> |
| <span class="source-line-no">050</span><span id="line-50"> this.conf = conf;</span> |
| <span class="source-line-no">051</span><span id="line-51"></span> |
| <span class="source-line-no">052</span><span id="line-52"> this.replicationZNode = ZNodePaths.joinZNode(this.zookeeper.getZNodePaths().baseZNode,</span> |
| <span class="source-line-no">053</span><span id="line-53"> conf.get(REPLICATION_ZNODE, REPLICATION_ZNODE_DEFAULT));</span> |
| <span class="source-line-no">054</span><span id="line-54"> }</span> |
| <span class="source-line-no">055</span><span id="line-55"></span> |
| <span class="source-line-no">056</span><span id="line-56"> /**</span> |
| <span class="source-line-no">057</span><span id="line-57"> * Serialized protobuf of <code>state</code> with pb magic prefix prepended suitable for use as</span> |
| <span class="source-line-no">058</span><span id="line-58"> * content of a peer-state znode under a peer cluster id as in</span> |
| <span class="source-line-no">059</span><span id="line-59"> * /hbase/replication/peers/PEER_ID/peer-state.</span> |
| <span class="source-line-no">060</span><span id="line-60"> */</span> |
| <span class="source-line-no">061</span><span id="line-61"> protected static byte[] toByteArray(final ReplicationProtos.ReplicationState.State state) {</span> |
| <span class="source-line-no">062</span><span id="line-62"> ReplicationProtos.ReplicationState msg =</span> |
| <span class="source-line-no">063</span><span id="line-63"> ReplicationProtos.ReplicationState.newBuilder().setState(state).build();</span> |
| <span class="source-line-no">064</span><span id="line-64"> // There is no toByteArray on this pb Message?</span> |
| <span class="source-line-no">065</span><span id="line-65"> // 32 bytes is default which seems fair enough here.</span> |
| <span class="source-line-no">066</span><span id="line-66"> try (ByteArrayOutputStream baos = new ByteArrayOutputStream()) {</span> |
| <span class="source-line-no">067</span><span id="line-67"> CodedOutputStream cos = CodedOutputStream.newInstance(baos, 16);</span> |
| <span class="source-line-no">068</span><span id="line-68"> msg.writeTo(cos);</span> |
| <span class="source-line-no">069</span><span id="line-69"> cos.flush();</span> |
| <span class="source-line-no">070</span><span id="line-70"> baos.flush();</span> |
| <span class="source-line-no">071</span><span id="line-71"> return ProtobufUtil.prependPBMagic(baos.toByteArray());</span> |
| <span class="source-line-no">072</span><span id="line-72"> } catch (IOException e) {</span> |
| <span class="source-line-no">073</span><span id="line-73"> throw new RuntimeException(e);</span> |
| <span class="source-line-no">074</span><span id="line-74"> }</span> |
| <span class="source-line-no">075</span><span id="line-75"> }</span> |
| <span class="source-line-no">076</span><span id="line-76">}</span> |
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| </pre> |
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