StatusIndexes.java

/**
 * JBoss, Home of Professional Open Source
 * Copyright 2011, Red Hat, Inc. and/or its affiliates, and individual
 * contributors by the @authors tag. See the copyright.txt in the
 * distribution for a full listing of individual contributors.
 *
 * 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.seam.cron.api.restriction;

import com.workplacesystems.utilsj.collections.IterativeCallback;

/**
 * Provides various methods for interrogating the current state of the queue
 * when deciding whether a job can run in a AsyncRestriction method.
 * 
 * @author Dave Oxley
 */
public interface StatusIndexes {
    
    public int countOfNotRunProcesses();

    public int countOfRunningProcesses();

    public int countOfWaitingToRunProcesses();

    public int countOfFailedProcesses();

    public <R> R iterateNotRunProcesses(IterativeCallback<Object,R> ic);

    public <R> R iterateRunningProcesses(IterativeCallback<Object,R> ic);

    public <R> R iterateWaitingToRunProcesses(IterativeCallback<Object,R> ic);

    public <R> R iterateFailedProcesses(IterativeCallback<Object,R> ic);
}