| /** |
| * 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.RetrySleeper; |
| import org.apache.curator.framework.api.BackgroundCallback; |
| import java.util.concurrent.Delayed; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| class OperationAndData<T> implements Delayed, RetrySleeper |
| { |
| private static final AtomicLong nextOrdinal = new AtomicLong(); |
| |
| private final BackgroundOperation<T> operation; |
| private final T data; |
| private final BackgroundCallback callback; |
| private final long startTimeMs = System.currentTimeMillis(); |
| private final ErrorCallback<T> errorCallback; |
| private final AtomicInteger retryCount = new AtomicInteger(0); |
| private final AtomicLong sleepUntilTimeMs = new AtomicLong(0); |
| private final long ordinal = nextOrdinal.getAndIncrement(); |
| private final Object context; |
| |
| interface ErrorCallback<T> |
| { |
| void retriesExhausted(OperationAndData<T> operationAndData); |
| } |
| |
| OperationAndData(BackgroundOperation<T> operation, T data, BackgroundCallback callback, ErrorCallback<T> errorCallback, Object context) |
| { |
| this.operation = operation; |
| this.data = data; |
| this.callback = callback; |
| this.errorCallback = errorCallback; |
| this.context = context; |
| } |
| |
| Object getContext() |
| { |
| return context; |
| } |
| |
| void callPerformBackgroundOperation() throws Exception |
| { |
| operation.performBackgroundOperation(this); |
| } |
| |
| T getData() |
| { |
| return data; |
| } |
| |
| long getElapsedTimeMs() |
| { |
| return System.currentTimeMillis() - startTimeMs; |
| } |
| |
| int getThenIncrementRetryCount() |
| { |
| return retryCount.getAndIncrement(); |
| } |
| |
| BackgroundCallback getCallback() |
| { |
| return callback; |
| } |
| |
| ErrorCallback<T> getErrorCallback() |
| { |
| return errorCallback; |
| } |
| |
| @VisibleForTesting |
| BackgroundOperation<T> getOperation() |
| { |
| return operation; |
| } |
| |
| @Override |
| public void sleepFor(long time, TimeUnit unit) throws InterruptedException |
| { |
| sleepUntilTimeMs.set(System.currentTimeMillis() + TimeUnit.MILLISECONDS.convert(time, unit)); |
| } |
| |
| @Override |
| public long getDelay(TimeUnit unit) |
| { |
| return unit.convert(sleepUntilTimeMs.get() - System.currentTimeMillis(), TimeUnit.MILLISECONDS); |
| } |
| |
| @Override |
| public int compareTo(Delayed o) |
| { |
| if ( o == this ) |
| { |
| return 0; |
| } |
| |
| long diff = getDelay(TimeUnit.MILLISECONDS) - o.getDelay(TimeUnit.MILLISECONDS); |
| if ( diff == 0 ) |
| { |
| if ( o instanceof OperationAndData ) |
| { |
| diff = ordinal - ((OperationAndData)o).ordinal; |
| } |
| } |
| |
| return (diff < 0) ? -1 : ((diff > 0) ? 1 : 0); |
| } |
| } |