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  * Copyright 2010 JBoss Inc
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  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package org.drools.runtime.process;

An interface that represents an element that is listening for specific types of events.
public interface EventListener {

Signals that an event has occurred. The type parameter defines which type of event and the event parameter can contain additional information related to the event.

type the type of event
event the data associated with this event
    void signalEvent(String type
                     Object event);

Returns the event types this event listener is interested in. May return null if the event types are unknown.
    String[] getEventTypes();
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