01: package org.drools.spi;
02:
03: /*
04: * Copyright 2005 JBoss Inc
05: *
06: * Licensed under the Apache License, Version 2.0 (the "License");
07: * you may not use this file except in compliance with the License.
08: * You may obtain a copy of the License at
09: *
10: * http://www.apache.org/licenses/LICENSE-2.0
11: *
12: * Unless required by applicable law or agreed to in writing, software
13: * distributed under the License is distributed on an "AS IS" BASIS,
14: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15: * See the License for the specific language governing permissions and
16: * limitations under the License.
17: */
18:
19: import java.io.Serializable;
20:
21: /**
22: * Interface for specifying truthness duration.
23: *
24: * @see org.drools.rule.Rule#setDuration
25: * @see org.drools.rule.Rule#getDuration
26: *
27: * @author <a href="mailto:bob@werken.com">bob mcwhirter </a>
28: */
29: public interface Duration extends Serializable {
30: /**
31: * <p>
32: * Retrieve the duration for which the conditions of this <code>Tuple</code>
33: * must remain true before the rule will fire.
34: * </p>
35: *
36: * @param tuple
37: *
38: * @return the duration
39: */
40: long getDuration(Tuple tuple);
41: }
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