| /* |
| * 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.slider.server.appmaster.actions; |
| |
| import org.apache.slider.common.tools.SliderUtils; |
| import org.apache.slider.server.appmaster.SliderAppMaster; |
| import org.apache.slider.server.appmaster.state.AppState; |
| |
| import java.io.IOException; |
| import java.util.concurrent.Delayed; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| public abstract class AsyncAction implements Delayed { |
| |
| private static final AtomicLong sequencer = new AtomicLong(0); |
| |
| public final String name; |
| private long nanos; |
| public final int attrs; |
| private final long sequenceNumber = sequencer.incrementAndGet(); |
| |
| |
| protected AsyncAction(String name) { |
| this(name, 0); |
| } |
| |
| protected AsyncAction(String name, |
| long delayMillis) { |
| this(name, delayMillis, TimeUnit.MILLISECONDS); |
| } |
| |
| protected AsyncAction(String name, |
| long delay, |
| TimeUnit timeUnit) { |
| this(name, delay, timeUnit, 0); |
| } |
| |
| protected AsyncAction(String name, |
| long delay, |
| TimeUnit timeUnit, |
| int attrs) { |
| this.name = name; |
| this.setNanos(convertAndOffset(delay, timeUnit)); |
| this.attrs = attrs; |
| } |
| |
| protected long convertAndOffset(long delay, TimeUnit timeUnit) { |
| return now() + TimeUnit.NANOSECONDS.convert(delay, timeUnit); |
| } |
| |
| /** |
| * The current time in nanos |
| * @return now |
| */ |
| protected long now() { |
| return System.nanoTime(); |
| } |
| |
| @Override |
| public long getDelay(TimeUnit unit) { |
| return unit.convert(getNanos() - now(), TimeUnit.NANOSECONDS); |
| } |
| |
| @Override |
| public int compareTo(Delayed that) { |
| if (this == that) { |
| return 0; |
| } |
| return SliderUtils.compareTo( |
| getDelay(TimeUnit.NANOSECONDS), |
| that.getDelay(TimeUnit.NANOSECONDS)); |
| } |
| |
| @Override |
| public String toString() { |
| final StringBuilder sb = |
| new StringBuilder(super.toString()); |
| sb.append(" name='").append(name).append('\''); |
| sb.append(", delay=").append(getDelay(TimeUnit.SECONDS)); |
| sb.append(", attrs=").append(attrs); |
| sb.append(", sequenceNumber=").append(sequenceNumber); |
| sb.append('}'); |
| return sb.toString(); |
| } |
| |
| protected int getAttrs() { |
| return attrs; |
| } |
| |
| /** |
| * Ask if an action has an of the specified bits set. |
| * This is not an equality test. |
| * @param attr attribute |
| * @return true iff the action has any of the bits in the attr arg set |
| */ |
| public boolean hasAttr(int attr) { |
| return (attrs & attr) != 0; |
| } |
| |
| /** |
| * Actual application |
| * @param appMaster |
| * @param queueService |
| * @param appState |
| * @throws IOException |
| */ |
| public abstract void execute(SliderAppMaster appMaster, |
| QueueAccess queueService, AppState appState) throws Exception; |
| |
| public long getNanos() { |
| return nanos; |
| } |
| |
| public void setNanos(long nanos) { |
| this.nanos = nanos; |
| } |
| |
| public static final int ATTR_CHANGES_APP_SIZE = 1; |
| public static final int ATTR_HALTS_APP = 2; |
| public static final int ATTR_REVIEWS_APP_SIZE = 4; |
| } |