/**
    * 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.savvis.vpdc.predicates;
  
  import static com.google.common.base.Preconditions.checkNotNull;
  
  import javax.annotation.Resource;
  import javax.inject.Singleton;
  
  import org.jclouds.logging.Logger;
  import org.jclouds.savvis.vpdc.VPDCClient;
  import org.jclouds.savvis.vpdc.domain.Task;
  
  import com.google.common.base.Predicate;
  import com.google.inject.Inject;
  
  /**
   * 
   * Tests to see if a task succeeds.
   * 
   * @author Adrian Cole
   */
  @Singleton
  public class TaskSuccess implements Predicate<String> {
  
     private final VPDCClient client;
  
     @Resource
     protected Logger logger = Logger.NULL;
  
     @Inject
     public TaskSuccess(VPDCClient client) {
        this.client = client;
     }
  
     public boolean apply(String taskId) {
        logger.trace("looking for status on task %s", checkNotNull(taskId, "taskId"));
        Task task = refresh(taskId);
        if (task == null)
           return false;
        logger.trace("%s: looking for task status %s: currently: %s", task.getId(), Task.Status.SUCCESS, task.getStatus());
        if (task.getError() != null)
           throw new IllegalStateException(String.format("task %s failed with exception %s", task.getId(), task
                 .getError().toString()));
        return task.getStatus() == Task.Status.SUCCESS;
     }
  
     private Task refresh(String taskId) {
        return client.getBrowsingClient().getTask(taskId);
     }
  }