| /** |
| * 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.curator.framework.imps; |
| |
| import com.google.common.collect.ImmutableList; |
| import org.apache.curator.RetryLoop; |
| import org.apache.curator.TimeTrace; |
| import org.apache.curator.framework.api.*; |
| import org.apache.zookeeper.AsyncCallback; |
| import org.apache.zookeeper.admin.ZooKeeperAdmin; |
| import org.apache.zookeeper.data.Stat; |
| import org.apache.zookeeper.server.DataTree; |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.Executor; |
| |
| public class ReconfigBuilderImpl implements ReconfigBuilder, BackgroundOperation<Void>, ErrorListenerReconfigBuilderMain |
| { |
| private final CuratorFrameworkImpl client; |
| |
| private Backgrounding backgrounding = new Backgrounding(); |
| private Stat responseStat; |
| private long fromConfig = -1; |
| private List<String> newMembers; |
| private List<String> joining; |
| private List<String> leaving; |
| |
| public ReconfigBuilderImpl(CuratorFrameworkImpl client) |
| { |
| this.client = client; |
| } |
| |
| public ReconfigBuilderImpl(CuratorFrameworkImpl client, Backgrounding backgrounding, Stat responseStat, long fromConfig, List<String> newMembers, List<String> joining, List<String> leaving) |
| { |
| this.client = client; |
| this.backgrounding = backgrounding; |
| this.responseStat = responseStat; |
| this.fromConfig = fromConfig; |
| this.newMembers = newMembers; |
| this.joining = joining; |
| this.leaving = leaving; |
| } |
| |
| public byte[] forEnsemble() throws Exception |
| { |
| if ( backgrounding.inBackground() ) |
| { |
| client.processBackgroundOperation(new OperationAndData<>(this, null, backgrounding.getCallback(), null, backgrounding.getContext(), null), null); |
| return new byte[0]; |
| } |
| else |
| { |
| return ensembleInForeground(); |
| } |
| } |
| |
| @Override |
| public ErrorListenerReconfigBuilderMain inBackground() |
| { |
| backgrounding = new Backgrounding(true); |
| return this; |
| } |
| |
| @Override |
| public ErrorListenerReconfigBuilderMain inBackground(Object context) |
| { |
| backgrounding = new Backgrounding(context); |
| return this; |
| } |
| |
| @Override |
| public ErrorListenerReconfigBuilderMain inBackground(BackgroundCallback callback) |
| { |
| backgrounding = new Backgrounding(callback); |
| return this; |
| } |
| |
| @Override |
| public ErrorListenerReconfigBuilderMain inBackground(BackgroundCallback callback, Object context) |
| { |
| backgrounding = new Backgrounding(callback, context); |
| return this; |
| } |
| |
| @Override |
| public ErrorListenerReconfigBuilderMain inBackground(BackgroundCallback callback, Executor executor) |
| { |
| backgrounding = new Backgrounding(callback, executor); |
| return this; |
| } |
| |
| @Override |
| public ErrorListenerReconfigBuilderMain inBackground(BackgroundCallback callback, Object context, Executor executor) |
| { |
| backgrounding = new Backgrounding(client, callback, context, executor); |
| return this; |
| } |
| |
| @Override |
| public ReconfigBuilderMain withUnhandledErrorListener(UnhandledErrorListener listener) |
| { |
| backgrounding = new Backgrounding(backgrounding, listener); |
| return this; |
| } |
| |
| @Override |
| public StatConfigureEnsembleable withNewMembers(String... server) |
| { |
| return withNewMembers((server != null) ? Arrays.asList(server) : null); |
| } |
| |
| @Override |
| public StatConfigureEnsembleable withNewMembers(List<String> servers) |
| { |
| newMembers = (servers != null && !servers.isEmpty()) ? ImmutableList.copyOf(servers) : null; |
| return new StatConfigureEnsembleable() |
| { |
| @Override |
| public Ensembleable<byte[]> fromConfig(long config) throws Exception |
| { |
| fromConfig = config; |
| return this; |
| } |
| |
| @Override |
| public byte[] forEnsemble() throws Exception |
| { |
| return ReconfigBuilderImpl.this.forEnsemble(); |
| } |
| |
| @Override |
| public ConfigureEnsembleable storingStatIn(Stat stat) |
| { |
| responseStat = stat; |
| return this; |
| } |
| }; |
| } |
| |
| @Override |
| public LeaveStatConfigEnsembleable joining(String... server) |
| { |
| return joining((server != null) ? Arrays.asList(server) : null); |
| } |
| |
| @Override |
| public LeaveStatConfigEnsembleable joining(List<String> servers) |
| { |
| joining = (servers != null && !servers.isEmpty()) ? ImmutableList.copyOf(servers) : null; |
| |
| return new LeaveStatConfigEnsembleable() |
| { |
| @Override |
| public byte[] forEnsemble() throws Exception |
| { |
| return ReconfigBuilderImpl.this.forEnsemble(); |
| } |
| |
| @Override |
| public ConfigureEnsembleable storingStatIn(Stat stat) |
| { |
| responseStat = stat; |
| return this; |
| } |
| |
| @Override |
| public Ensembleable<byte[]> fromConfig(long config) throws Exception |
| { |
| fromConfig = config; |
| return this; |
| } |
| |
| @Override |
| public JoinStatConfigEnsembleable leaving(String... server) |
| { |
| return ReconfigBuilderImpl.this.leaving(server); |
| } |
| |
| @Override |
| public JoinStatConfigEnsembleable leaving(List<String> servers) |
| { |
| return ReconfigBuilderImpl.this.leaving(servers); |
| } |
| }; |
| } |
| |
| @Override |
| public JoinStatConfigEnsembleable leaving(String... server) |
| { |
| return leaving((server != null) ? Arrays.asList(server) : null); |
| } |
| |
| @Override |
| public JoinStatConfigEnsembleable leaving(List<String> servers) |
| { |
| leaving = (servers != null && !servers.isEmpty()) ? ImmutableList.copyOf(servers) : null; |
| |
| return new JoinStatConfigEnsembleable() |
| { |
| @Override |
| public byte[] forEnsemble() throws Exception |
| { |
| return ReconfigBuilderImpl.this.forEnsemble(); |
| } |
| |
| @Override |
| public ConfigureEnsembleable storingStatIn(Stat stat) |
| { |
| responseStat = stat; |
| return this; |
| } |
| |
| @Override |
| public Ensembleable<byte[]> fromConfig(long config) throws Exception |
| { |
| fromConfig = config; |
| return this; |
| } |
| |
| @Override |
| public LeaveStatConfigEnsembleable joining(String... server) |
| { |
| return joining((server != null) ? Arrays.asList(server) : null); |
| } |
| |
| @Override |
| public LeaveStatConfigEnsembleable joining(List<String> servers) |
| { |
| return ReconfigBuilderImpl.this.joining(servers); |
| } |
| }; |
| } |
| |
| @Override |
| public void performBackgroundOperation(final OperationAndData<Void> data) throws Exception |
| { |
| try |
| { |
| final TimeTrace trace = client.getZookeeperClient().startTracer("ReconfigBuilderImpl-Background"); |
| AsyncCallback.DataCallback callback = new AsyncCallback.DataCallback() |
| { |
| @Override |
| public void processResult(int rc, String path, Object ctx, byte[] bytes, Stat stat) |
| { |
| trace.commit(); |
| if ( (responseStat != null) && (stat != null) ) |
| { |
| DataTree.copyStat(stat, responseStat); |
| } |
| CuratorEvent event = new CuratorEventImpl(client, CuratorEventType.RECONFIG, rc, path, null, ctx, stat, bytes, null, null, null, null); |
| client.processBackgroundOperation(data, event); |
| } |
| }; |
| ((ZooKeeperAdmin)client.getZooKeeper()).reconfigure(joining, leaving, newMembers, fromConfig, callback, backgrounding.getContext()); |
| } |
| catch ( Throwable e ) |
| { |
| backgrounding.checkError(e, null); |
| } |
| } |
| |
| private byte[] ensembleInForeground() throws Exception |
| { |
| TimeTrace trace = client.getZookeeperClient().startTracer("ReconfigBuilderImpl-Foreground"); |
| byte[] responseData = RetryLoop.callWithRetry |
| ( |
| client.getZookeeperClient(), |
| new Callable<byte[]>() |
| { |
| @Override |
| public byte[] call() throws Exception |
| { |
| return ((ZooKeeperAdmin)client.getZooKeeper()).reconfigure(joining, leaving, newMembers, fromConfig, responseStat); |
| } |
| } |
| ); |
| trace.commit(); |
| return responseData; |
| } |
| } |