curator-framework/src/main/java/org/apache/curator/framework/imps/SyncBuilderImpl.java

/**
 * 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 org.apache.curator.TimeTrace;
import org.apache.curator.framework.api.BackgroundCallback;
import org.apache.curator.framework.api.CuratorEvent;
import org.apache.curator.framework.api.CuratorEventType;
import org.apache.curator.framework.api.Pathable;
import org.apache.curator.framework.api.SyncBuilder;
import org.apache.zookeeper.AsyncCallback;
import java.util.concurrent.Executor;

public class SyncBuilderImpl implements SyncBuilder, BackgroundOperation<String>
{
    private final CuratorFrameworkImpl client;
    private Backgrounding backgrounding = new Backgrounding();

    public SyncBuilderImpl(CuratorFrameworkImpl client)
    {
        //To change body of created methods use File | Settings | File Templates.
        this.client = client;
    }

    @Override
    public Pathable<Void> inBackground()
    {
        // NOP always in background
        return this;
    }

    @Override
    public Pathable<Void> inBackground(Object context)
    {
        backgrounding = new Backgrounding(context);
        return this;
    }

    @Override
    public Pathable<Void> inBackground(BackgroundCallback callback)
    {
        backgrounding = new Backgrounding(callback);
        return this;
    }

    @Override
    public Pathable<Void> inBackground(BackgroundCallback callback, Object context)
    {
        backgrounding = new Backgrounding(callback, context);
        return this;
    }

    @Override
    public Pathable<Void> inBackground(BackgroundCallback callback, Executor executor)
    {
        backgrounding = new Backgrounding(callback, executor);
        return this;
    }

    @Override
    public Pathable<Void> inBackground(BackgroundCallback callback, Object context, Executor executor)
    {
        backgrounding = new Backgrounding(client, callback, context, executor);
        return this;
    }

    @Override
    public void performBackgroundOperation(final OperationAndData<String> operationAndData) throws Exception
    {
        final TimeTrace trace = client.getZookeeperClient().startTracer("SyncBuilderImpl-Background");
        final String path = operationAndData.getData();
        String adjustedPath = client.fixForNamespace(path);

        AsyncCallback.VoidCallback voidCallback = new AsyncCallback.VoidCallback()
        {
            @Override
            public void processResult(int rc, String path, Object ctx)
            {
                trace.commit();
                CuratorEvent event = new CuratorEventImpl(client, CuratorEventType.SYNC, rc, path, path, ctx, null, null, null, null, null);
                client.processBackgroundOperation(operationAndData, event);
            }
        };
        client.getZooKeeper().sync(adjustedPath, voidCallback, backgrounding.getContext());
    }

    @Override
    public Void forPath(String path) throws Exception
    {
        OperationAndData<String> operationAndData = new OperationAndData<String>(this, path, backgrounding.getCallback(), null);
        client.processBackgroundOperation(operationAndData, null);
        return null;
    }
}