PendingIn.java

package context.arch.service.helper;

import java.util.Hashtable;

/**
 * This class maintains a list of pending service requests, kept by a 
 * component making the service requests.
 *
 * @see context.arch.service.Service
 */
public class PendingIn extends Hashtable<String, String> {

	private static final long serialVersionUID = -6943878872639597481L;

	/**
	 * Basic empty constructor
	 */
	public PendingIn() {
		super();
	}

	/**
	 * Adds the given request id to the pending container.
	 *
	 * @param id Request id to make pending
	 */
	public void addPending(String id) {
		put(id, id); // if key == value, then why use a Hashtable? -- Brian 
	}

	/**
	 * Determines whether the given request id is in the pending container
	 *
	 * @param id Request id to look for
	 * @return whether request is pending
	 */
	public boolean isPending(String id) {
		return containsKey(id);
	}

	/**
	 * Removes the given request id from the pending container
	 *
	 * @param id Request id to remove
	 */
	public void removePending(String id) {
		remove(id);
	}

	/**
	 * Returns the number of requests pending in the container
	 *
	 * return the number of requests pending in the container
	 */
	public int numPending() {
		return size();
	}

}