| /** |
| * 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.annotations.VisibleForTesting; |
| import org.apache.curator.utils.CloseableUtils; |
| import org.apache.curator.framework.CuratorFrameworkFactory; |
| import org.apache.curator.framework.CuratorTempFramework; |
| import org.apache.curator.framework.api.TempGetDataBuilder; |
| import org.apache.curator.framework.api.transaction.CuratorTransaction; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.ThreadFactory; |
| import java.util.concurrent.TimeUnit; |
| |
| public class CuratorTempFrameworkImpl implements CuratorTempFramework |
| { |
| private final CuratorFrameworkFactory.Builder factory; |
| private final long inactiveThresholdMs; |
| |
| // guarded by sync |
| private CuratorFrameworkImpl client; |
| |
| // guarded by sync |
| private ScheduledExecutorService cleanup; |
| |
| // guarded by sync |
| private long lastAccess; |
| |
| public CuratorTempFrameworkImpl(CuratorFrameworkFactory.Builder factory, long inactiveThresholdMs) |
| { |
| this.factory = factory; |
| this.inactiveThresholdMs = inactiveThresholdMs; |
| } |
| |
| @Override |
| public void close() |
| { |
| closeClient(); |
| } |
| |
| @Override |
| public CuratorTransaction inTransaction() throws Exception |
| { |
| openConnectionIfNeeded(); |
| return new CuratorTransactionImpl(client); |
| } |
| |
| @Override |
| public TempGetDataBuilder getData() throws Exception |
| { |
| openConnectionIfNeeded(); |
| return new TempGetDataBuilderImpl(client); |
| } |
| |
| @VisibleForTesting |
| CuratorFrameworkImpl getClient() |
| { |
| return client; |
| } |
| |
| @VisibleForTesting |
| ScheduledExecutorService getCleanup() |
| { |
| return cleanup; |
| } |
| |
| @VisibleForTesting |
| synchronized void updateLastAccess() |
| { |
| lastAccess = System.currentTimeMillis(); |
| } |
| |
| private synchronized void openConnectionIfNeeded() throws Exception |
| { |
| if ( client == null ) |
| { |
| client = (CuratorFrameworkImpl)factory.build(); // cast is safe - we control both sides of this |
| client.start(); |
| } |
| |
| if ( cleanup == null ) |
| { |
| ThreadFactory threadFactory = factory.getThreadFactory(); |
| cleanup = (threadFactory != null) ? Executors.newScheduledThreadPool(1, threadFactory) : Executors.newScheduledThreadPool(1); |
| |
| Runnable command = new Runnable() |
| { |
| @Override |
| public void run() |
| { |
| checkInactive(); |
| } |
| }; |
| cleanup.scheduleAtFixedRate(command, inactiveThresholdMs, inactiveThresholdMs, TimeUnit.MILLISECONDS); |
| } |
| |
| updateLastAccess(); |
| } |
| |
| private synchronized void checkInactive() |
| { |
| long elapsed = System.currentTimeMillis() - lastAccess; |
| if ( elapsed >= inactiveThresholdMs ) |
| { |
| closeClient(); |
| } |
| } |
| |
| private synchronized void closeClient() |
| { |
| if ( cleanup != null ) |
| { |
| cleanup.shutdownNow(); |
| cleanup = null; |
| } |
| |
| if ( client != null ) |
| { |
| CloseableUtils.closeQuietly(client); |
| client = null; |
| } |
| } |
| } |