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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 node instance represents the execution of one specific node in a process instance. Whenever a node is reached during the execution of a process instance, a node instance will be created. A node instance contains all the runtime state related to the execution of that node. Multiple node instances for the same node can coexist in the same process instance (if that node is to be executed multiple times in that process instance). A node instance is uniquely identified (within its node instance container!) by an id. Node instances can be nested, meaning that a node instance can be created as part of another node instance.
public interface NodeInstance {

    
The id of the node instance. This is unique within the node instance container this node instance lives in.

Returns:
the id of the node instance
    long getId();

    
The id of the node this node instance refers to. The node represents the definition that this node instance was based on.

Returns:
the id of the node this node instance refers to
    long getNodeId();
    
    
Return the node this node instance refers to. The node represents the definition that this node instance was based on.

Returns:
the node this node instance refers to
    Node getNode();

    
The name of the node this node instance refers to.

Returns:
the name of the node this node instance refers to
    String getNodeName();

    
The process instance that this node instance is executing in.

Returns:
the process instance that this node instance is executing in
The node instance container that this node instance is part of. If the node was defined in the top-level process scope, this is the same as the process instance. If not, it is the node instance container this node instance is executing in.

Returns:
the process instance that this node instance is executing in
    
    Object getVariable(String variableName);
    
    void setVariable(String variableNameObject value);
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