KillingProcessWatcher.java

package de.skuzzle.polly.process;


/**
 * This {@link ProcessWatcher} kills the observed process on timeout.
 * 
 * @author Simon
 */
public class KillingProcessWatcher extends ProcessWatcher {
    
    private boolean killOnError;
    
    
    
    /**
     * Creates a new KillingProcessWatcher with a timeout.
     * 
     * @param timeout The timeout to wait before the process is destroyed.
     * @param killOnError If set to <code>true</code>, the watched process is killed
     *      if an error occurred during waiting (this can happen before time ran out).
     * @throws IllegalArgumentException if timeout is < 0.
     */
    public KillingProcessWatcher(int timeout, boolean killOnError) {
        super(timeout);
        if (timeout < 0) {
            throw new IllegalArgumentException("timeout must be positive");
        }
        this.killOnError = killOnError;
    }
    
    
    
    @Override
    public void processExit(ProcessWrapper proc, int exitType) {
        if (exitType == EXIT_TYPE_TIMEOUT) {
            proc.getProcess().destroy();
        } else if (this.killOnError && exitType == EXIT_TYPE_ERROR) {
            proc.getProcess().destroy();
        }
    }
}