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 /*
  * Copyright 2010 JBoss Inc
  *
  * 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.drools.runtime.process;
A process instance represents one specific instance of a process that is currently executing. Whenever a process is started, a process instance is created that represents that specific instance that was started. It contains all runtime information related to that instance. Multiple process instances of the same process can be executed simultaneously. For example, consider a process definition that describes how to process a purchase order. Whenever a new purchase order comes in, a new process instance will be created for that purchase order. Multiple process instances (one for each purchase order) can coexist. A process instance is uniquely identified by an id. This class can be extended to represent one specific type of process, e.g. WorkflowProcessInstance when using a WorkflowProcess where the process logic is expressed as a flow chart.

See also:
org.drools.core.runtime.process.WorkflowProcessInstance
public interface ProcessInstance
    extends
    EventListener {
    int STATE_PENDING   = 0;
    int STATE_ACTIVE    = 1;
    int STATE_COMPLETED = 2;
    int STATE_ABORTED   = 3;
    int STATE_SUSPENDED = 4;

    
The id of the process definition that is related to this process instance.

Returns:
the id of the process definition that is related to this process instance
    
    Process getProcess();

    
The unique id of this process instance.

Returns:
the unique id of this process instance
    long getId();

    
The name of the process definition that is related to this process instance.

Returns:
the name of the process definition that is related to this process instance
    String getProcessName();

    
The state of the process instance.

Returns:
the state of the process instance
    int getState();
    
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