| /** |
| * Licensed to jclouds, Inc. (jclouds) under one or more |
| * contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. jclouds 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.jclouds.compute.callables; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| import java.util.Date; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| |
| import javax.annotation.Resource; |
| |
| import org.jclouds.Constants; |
| import org.jclouds.compute.domain.ExecResponse; |
| import org.jclouds.compute.predicates.ScriptStatusReturnsZero; |
| import org.jclouds.compute.reference.ComputeServiceConstants; |
| import org.jclouds.logging.Logger; |
| import org.jclouds.predicates.RetryablePredicate; |
| import org.jclouds.scriptbuilder.InitBuilder; |
| import org.jclouds.ssh.SshClient; |
| |
| import com.google.common.base.Predicate; |
| import com.google.common.base.Throwables; |
| import com.google.common.util.concurrent.AbstractFuture; |
| import com.google.inject.Inject; |
| import com.google.inject.assistedinject.Assisted; |
| import com.google.inject.name.Named; |
| |
| /** |
| * A future that works in tandem with a task that was invoked by {@link InitBuilder} |
| * |
| * @author Adrian Cole |
| */ |
| public class BlockUntilInitScriptStatusIsZeroThenReturnOutput extends AbstractFuture<ExecResponse> { |
| |
| public static interface Factory { |
| BlockUntilInitScriptStatusIsZeroThenReturnOutput create(SudoAwareInitManager commandRunner); |
| } |
| |
| @Resource |
| @Named(ComputeServiceConstants.COMPUTE_LOGGER) |
| protected Logger logger = Logger.NULL; |
| |
| private final ExecutorService userThreads; |
| private final SudoAwareInitManager commandRunner; |
| private final RetryablePredicate<String> notRunningAnymore; |
| |
| private boolean shouldCancel; |
| |
| @Inject |
| public BlockUntilInitScriptStatusIsZeroThenReturnOutput( |
| @Named(Constants.PROPERTY_USER_THREADS) ExecutorService userThreads, |
| ComputeServiceConstants.InitStatusProperties properties, |
| final ScriptStatusReturnsZero stateRunning, @Assisted final SudoAwareInitManager commandRunner) { |
| |
| long retryMaxWait = TimeUnit.DAYS.toMillis(365); // arbitrarily high value, but Long.MAX_VALUE doesn't work! |
| long retryInitialPeriod = properties.initStatusInitialPeriod; |
| long retryMaxPeriod = properties.initStatusMaxPeriod; |
| |
| this.commandRunner = checkNotNull(commandRunner, "commandRunner"); |
| this.userThreads = checkNotNull(userThreads, "userThreads"); |
| this.notRunningAnymore = new RetryablePredicate<String>(new Predicate<String>() { |
| |
| @Override |
| public boolean apply(String arg0) { |
| return commandRunner.runAction(arg0).getOutput().trim().equals(""); |
| } |
| }, retryMaxWait, retryInitialPeriod, retryMaxPeriod, TimeUnit.MILLISECONDS) { |
| /** |
| * make sure we stop the retry loop if someone cancelled the future, this keeps threads |
| * from being consumed on dead tasks |
| */ |
| @Override |
| protected boolean atOrAfter(Date end) { |
| if (shouldCancel) |
| Throwables.propagate(new TimeoutException("cancelled")); |
| return super.atOrAfter(end); |
| } |
| }; |
| } |
| |
| /** |
| * in case login credentials or user changes at runtime. |
| */ |
| public void setSshClient(SshClient client) { |
| |
| } |
| |
| /** |
| * Submits a thread that will either set the result of the future or the exception that took |
| * place |
| */ |
| public BlockUntilInitScriptStatusIsZeroThenReturnOutput init() { |
| userThreads.submit(new Runnable() { |
| @Override |
| public void run() { |
| try { |
| boolean complete = notRunningAnymore.apply("status"); |
| String stdout = commandRunner.runAction("tail").getOutput(); |
| String stderr = commandRunner.runAction("tailerr").getOutput(); |
| // TODO make ScriptBuilder save exit status on nuhup |
| logger.debug("<< complete(%s) status(%s)", commandRunner.getStatement().getInstanceName(), complete); |
| set(new ExecResponse(stdout, stderr, complete && !shouldCancel ? 0 : -1)); |
| } catch (Exception e) { |
| setException(e); |
| } |
| } |
| }); |
| return this; |
| } |
| |
| @Override |
| protected void interruptTask() { |
| logger.debug("<< cancelled(%s)", commandRunner.getStatement().getInstanceName()); |
| commandRunner.refreshAndRunAction("stop"); |
| shouldCancel = true; |
| super.interruptTask(); |
| } |
| |
| @Override |
| public String toString() { |
| return String.format("running task[%s]", commandRunner); |
| } |
| |
| @Override |
| public int hashCode() { |
| final int prime = 31; |
| int result = 1; |
| result = prime * result + ((commandRunner == null) ? 0 : commandRunner.hashCode()); |
| result = prime * result + ((logger == null) ? 0 : logger.hashCode()); |
| result = prime * result + ((notRunningAnymore == null) ? 0 : notRunningAnymore.hashCode()); |
| result = prime * result + (shouldCancel ? 1231 : 1237); |
| result = prime * result + ((userThreads == null) ? 0 : userThreads.hashCode()); |
| return result; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) |
| return true; |
| if (obj == null) |
| return false; |
| if (getClass() != obj.getClass()) |
| return false; |
| BlockUntilInitScriptStatusIsZeroThenReturnOutput other = (BlockUntilInitScriptStatusIsZeroThenReturnOutput) obj; |
| if (commandRunner == null) { |
| if (other.commandRunner != null) |
| return false; |
| } else if (!commandRunner.equals(other.commandRunner)) |
| return false; |
| if (logger == null) { |
| if (other.logger != null) |
| return false; |
| } else if (!logger.equals(other.logger)) |
| return false; |
| if (notRunningAnymore == null) { |
| if (other.notRunningAnymore != null) |
| return false; |
| } else if (!notRunningAnymore.equals(other.notRunningAnymore)) |
| return false; |
| if (shouldCancel != other.shouldCancel) |
| return false; |
| if (userThreads == null) { |
| if (other.userThreads != null) |
| return false; |
| } else if (!userThreads.equals(other.userThreads)) |
| return false; |
| return true; |
| } |
| |
| @Override |
| public ExecResponse get(long timeout, TimeUnit unit) throws InterruptedException, TimeoutException, |
| ExecutionException { |
| try { |
| return super.get(timeout, unit); |
| } catch (TimeoutException e) { |
| throw new ScriptStillRunningException(timeout, unit, this); |
| } |
| } |
| |
| } |