Source Code Cross Referenced for CheckerConsumer.java in  » Content-Management-System » dspace » org » dspace » checker » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Content Management System » dspace » org.dspace.checker 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        /*
02:         * CheckerConsumer.java
03:         *
04:         * Version: $Revision: 2074 $
05:         *
06:         * Date: $Date: 2007-07-19 14:40:11 -0500 (Thu, 19 Jul 2007) $
07:         *
08:         * Copyright (c) 2002-2007, Hewlett-Packard Company and Massachusetts
09:         * Institute of Technology.  All rights reserved.
10:         *
11:         * Redistribution and use in source and binary forms, with or without
12:         * modification, are permitted provided that the following conditions are
13:         * met:
14:         *
15:         * - Redistributions of source code must retain the above copyright
16:         * notice, this list of conditions and the following disclaimer.
17:         *
18:         * - Redistributions in binary form must reproduce the above copyright
19:         * notice, this list of conditions and the following disclaimer in the
20:         * documentation and/or other materials provided with the distribution.
21:         *
22:         * - Neither the name of the Hewlett-Packard Company nor the name of the
23:         * Massachusetts Institute of Technology nor the names of their
24:         * contributors may be used to endorse or promote products derived from
25:         * this software without specific prior written permission.
26:         *
27:         * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
28:         * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
29:         * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
30:         * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
31:         * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
32:         * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
33:         * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
34:         * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
35:         * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
36:         * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
37:         * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
38:         * DAMAGE.
39:         */
40:
41:        package org.dspace.checker;
42:
43:        import org.apache.log4j.Logger;
44:        import org.dspace.core.Context;
45:        import org.dspace.event.Consumer;
46:        import org.dspace.event.Event;
47:
48:        /**
49:         * Class for removing Checker data for a Bitstreams based on deletion events.
50:         *
51:         * @version $Revision: 2074 $
52:         */
53:        public class CheckerConsumer implements  Consumer {
54:            /** log4j logger */
55:            private static Logger log = Logger.getLogger(CheckerConsumer.class);
56:
57:            private BitstreamInfoDAO bitstreamInfoDAO = new BitstreamInfoDAO();
58:
59:            /**
60:             * Initialize - allocate any resources required to operate.
61:             * Called at the start of ANY sequence of event consume() calls.
62:             */
63:            public void initialize() throws Exception {
64:                // no-op
65:            }
66:
67:            /**
68:             * Consume an event
69:             *
70:             * @param ctx       the execution context object
71:             *
72:             * @param event the content event
73:             */
74:            public void consume(Context ctx, Event event) throws Exception {
75:
76:                if (event.getEventType() == Event.DELETE) {
77:                    log.debug("Attempting to remove Checker Info");
78:                    bitstreamInfoDAO.deleteBitstreamInfoWithHistory(event
79:                            .getSubjectID());
80:                    log.debug("Completed removing Checker Info");
81:                }
82:            }
83:
84:            /**
85:             * Signal that there are no more events queued in this
86:             * event stream.
87:             */
88:            public void end(Context ctx) throws Exception {
89:                // no-op
90:            }
91:
92:            /**
93:             * Finish - free any allocated resources.
94:             * Called when consumer is being released
95:             */
96:            public void finish(Context ctx) throws Exception {
97:                // no-op
98:            }
99:        }
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