CommandQueue.java

/**
 * 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.waveprotocol.wave.client.scheduler;

import com.google.gwt.user.client.Command;

/**
 * Interface for command queues.
 *
 */
public interface CommandQueue {

  /**
   * Command queue that uses our {@link ScheduleCommand} scheduler.
   */
  public static final CommandQueue HIGH_PRIORITY = new CommandQueue() {
    /** Schedule */
    public void addCommand(final Command command) {
      SchedulerInstance.getHighPriorityTimer().schedule(new Scheduler.Task() {
        public void execute() {
          command.execute();
        }
      });
    }
  };
  /**
   * Adds a command to this queue.
   *
   * @param c
   */
  // TODO(user): rename to just add().
  void addCommand(Command c);
}