001 /*
002 * JBoss DNA (http://www.jboss.org/dna)
003 * See the COPYRIGHT.txt file distributed with this work for information
004 * regarding copyright ownership. Some portions may be licensed
005 * to Red Hat, Inc. under one or more contributor license agreements.
006 * See the AUTHORS.txt file in the distribution for a full listing of
007 * individual contributors.
008 *
009 * JBoss DNA is free software. Unless otherwise indicated, all code in JBoss DNA
010 * is licensed to you under the terms of the GNU Lesser General Public License as
011 * published by the Free Software Foundation; either version 2.1 of
012 * the License, or (at your option) any later version.
013 *
014 * JBoss DNA is distributed in the hope that it will be useful,
015 * but WITHOUT ANY WARRANTY; without even the implied warranty of
016 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
017 * Lesser General Public License for more details.
018 *
019 * You should have received a copy of the GNU Lesser General Public
020 * License along with this software; if not, write to the Free
021 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
022 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
023 */
024 package org.jboss.dna.connector.store.jpa.model.common;
025
026 import javax.persistence.Column;
027 import javax.persistence.Entity;
028 import javax.persistence.GeneratedValue;
029 import javax.persistence.GenerationType;
030 import javax.persistence.Id;
031 import javax.persistence.Lob;
032 import javax.persistence.NamedQueries;
033 import javax.persistence.NamedQuery;
034 import javax.persistence.Table;
035 import org.hibernate.annotations.Index;
036 import org.jboss.dna.graph.property.DateTime;
037 import org.jboss.dna.graph.property.basic.JodaDateTime;
038
039 /**
040 * Represents a record of the changes that have been made to the repository. The actual change events are serialized and stored in
041 * a binary (and compressed) format.
042 *
043 * @author Randall Hauch
044 */
045 @Entity
046 @Table( name = "DNA_CHANGELOG" )
047 @org.hibernate.annotations.Table( appliesTo = "DNA_CHANGELOG", indexes = @Index( name = "NS_CHANGE_TS_INX", columnNames = {"UTC_TIMESTAMP"} ) )
048 @NamedQueries( {
049 @NamedQuery( name = "ChangeLogEntity.findBetween", query = "select entry from ChangeLogEntity as entry where entry.timestampInUtc >= :start and entry.timestampInUtc <= :end" ),
050 @NamedQuery( name = "ChangeLogEntity.deleteBefore", query = "delete ChangeLogEntity entry where entry.timestampInUtc < :timestamp" )} )
051 public class ChangeLogEntity {
052
053 @Id
054 @GeneratedValue( strategy = GenerationType.AUTO )
055 @Column( name = "ID", updatable = false )
056 private Long id;
057
058 @Column( name = "USERNAME", updatable = false, nullable = false, length = 64, unique = false )
059 private String username;
060
061 @Column( name = "UTC_TIMESTAMP", updatable = false, nullable = false, unique = false )
062 private long timestampInUtc;
063
064 @Column( name = "CHANGE_COUNT", updatable = false, nullable = false, unique = false )
065 private int numChanges;
066
067 @Lob
068 @Column( name = "CHANGES", updatable = false, nullable = false, unique = false )
069 private byte[] changes;
070
071 public ChangeLogEntity( String username,
072 DateTime timestamp,
073 int numChanges,
074 byte[] changes ) {
075 this.username = username;
076 this.timestampInUtc = timestamp.toUtcTimeZone().getMilliseconds();
077 this.numChanges = numChanges;
078 this.changes = changes;
079 }
080
081 /**
082 * @return id
083 */
084 public Long getId() {
085 return id;
086 }
087
088 /**
089 * @return username
090 */
091 public String getUsername() {
092 return username;
093 }
094
095 /**
096 * @return timestampInUtc
097 */
098 public long getTimestampInUtc() {
099 return timestampInUtc;
100 }
101
102 /**
103 * @return changes
104 */
105 public byte[] getChanges() {
106 return changes;
107 }
108
109 /**
110 * @return numChanges
111 */
112 public int getNumChanges() {
113 return numChanges;
114 }
115
116 /**
117 * {@inheritDoc}
118 *
119 * @see java.lang.Object#hashCode()
120 */
121 @Override
122 public int hashCode() {
123 return id.hashCode();
124 }
125
126 /**
127 * {@inheritDoc}
128 *
129 * @see java.lang.Object#equals(java.lang.Object)
130 */
131 @Override
132 public boolean equals( Object obj ) {
133 if (obj == this) return true;
134 if (obj instanceof ChangeLogEntity) {
135 ChangeLogEntity that = (ChangeLogEntity)obj;
136 return id.equals(that.id);
137 }
138 return false;
139 }
140
141 /**
142 * {@inheritDoc}
143 *
144 * @see java.lang.Object#toString()
145 */
146 @Override
147 public String toString() {
148 return "" + numChanges + " changes by " + username + " at " + new JodaDateTime(timestampInUtc);
149 }
150 }