Package org.jboss.errai.bus.client.api.base

Source Code of org.jboss.errai.bus.client.api.base.TaskManagerFactory

/*
* Copyright 2010 JBoss, a divison Red Hat, Inc
*
* Licensed 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.jboss.errai.bus.client.api.base;

import org.jboss.errai.bus.client.api.TaskManager;
import org.jboss.errai.bus.client.framework.TaskManagerProvider;

public class TaskManagerFactory {

  private static final Object lock = new Object();
  private static volatile TaskManagerProvider provider;

  public static TaskManager get() {
    synchronized (lock) {
      if (provider == null) {
        _initForClient();
      }
      return provider.get();
    }

  }

  private static void _initForClient() {
    provider = new TaskManagerProvider() {
      private ClientTaskManager taskManager = new ClientTaskManager();

      public TaskManager get() {
        return taskManager;
      }
    };
  }

  public static void setTaskManagerProvider(TaskManagerProvider p) {
    synchronized (lock) {
      if (provider == null) {
        // Attempt to initialize the task manager twice. Will be ignored
        provider = p;
      }
    }
  }
}
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