01: // Copyright 2006 The Apache Software Foundation
02: //
03: // Licensed under the Apache License, Version 2.0 (the "License");
04: // you may not use this file except in compliance with the License.
05: // You may obtain a copy of the License at
06: //
07: // http://www.apache.org/licenses/LICENSE-2.0
08: //
09: // Unless required by applicable law or agreed to in writing, software
10: // distributed under the License is distributed on an "AS IS" BASIS,
11: // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12: // See the License for the specific language governing permissions and
13: // limitations under the License.
14:
15: package org.apache.tapestry.ioc.services;
16:
17: /**
18: * Used by {@link org.apache.tapestry.ioc.services.LoggingDecorator} to track which exceptions have
19: * been logged during the current request (the ExceptionTracker is perthread). This keeps redundant
20: * information from appearing in the console output.
21: *
22: *
23: */
24: public interface ExceptionTracker {
25: /**
26: * Returns true if the indicated exception has already been logged (it is assumed that the
27: * exception will be logged if this method returns false). The exception is recorded for later
28: * checks.
29: *
30: * @param exception
31: * to check
32: * @return false if the exception has not been previously checked, true otherwise
33: */
34: boolean exceptionLogged(Throwable exception);
35: }
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