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There is a newer version: 0.7.0-M1

package brooklyn.util.task;

import java.util.Map;

import brooklyn.management.ExecutionManager;
import brooklyn.management.Task;

/**
 * The preprocessor is an internal mechanism to decorate {@link Task}s.
 *
 * This can be used to enhance tasks that they acquire a {@code synchronized} block (to cause
 * them to effectively run singly-threaded), or clear intermediate queued jobs, etc.
 * 
 *
 * @deprecated in 0.4; unused code; will be deleted
 */
@Deprecated
public interface TaskPreprocessor {
    /**
     * Called by {@link BasicExecutionManager} when preprocessor is associated with an
     * execution manager.
     */
    public void injectManager(ExecutionManager m);

    /**
     * Called by {@link BasicExecutionManager} when preprocessor is associated with a tag.
     */
    public void injectTag(Object tag);

    /**
     * Called by {@link BasicExecutionManager} when task is submitted in the category, in
     * order of tags.
     */
    public void onSubmit(Map flags, Task task);

    /**
     * Called by {@link BasicExecutionManager} when task is started in the category, in
     * order of tags.
     */
    public void onStart(Map flags, Task task);

    /**
     * Called by {@link BasicExecutionManager} when task is ended in the category, in
     * reverse order of tags.
     */
    public void onEnd(Map flags, Task task);

}