Source Code Cross Referenced for DefaultTransactionDefinition.java in  » J2EE » spring-framework-2.0.6 » org » springframework » transaction » support » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » J2EE » spring framework 2.0.6 » org.springframework.transaction.support 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright 2002-2006 the original author or authors.
003:         *
004:         * Licensed under the Apache License, Version 2.0 (the "License");
005:         * you may not use this file except in compliance with the License.
006:         * You may obtain a copy of the License at
007:         *
008:         *      http://www.apache.org/licenses/LICENSE-2.0
009:         *
010:         * Unless required by applicable law or agreed to in writing, software
011:         * distributed under the License is distributed on an "AS IS" BASIS,
012:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013:         * See the License for the specific language governing permissions and
014:         * limitations under the License.
015:         */
016:
017:        package org.springframework.transaction.support;
018:
019:        import java.io.Serializable;
020:
021:        import org.springframework.core.Constants;
022:        import org.springframework.transaction.TransactionDefinition;
023:
024:        /**
025:         * Default implementation of the TransactionDefinition interface,
026:         * offering bean-style configuration and sensible default values
027:         * (PROPAGATION_REQUIRED, ISOLATION_DEFAULT, TIMEOUT_DEFAULT, readOnly=false).
028:         *
029:         * <p>Base class for both TransactionTemplate and DefaultTransactionAttribute.
030:         *
031:         * @author Juergen Hoeller
032:         * @since 08.05.2003
033:         * @see org.springframework.transaction.support.TransactionTemplate
034:         * @see org.springframework.transaction.interceptor.DefaultTransactionAttribute
035:         */
036:        public class DefaultTransactionDefinition implements 
037:                TransactionDefinition, Serializable {
038:
039:            /** Prefix for the propagation constants defined in TransactionDefinition */
040:            public static final String PREFIX_PROPAGATION = "PROPAGATION_";
041:
042:            /** Prefix for the isolation constants defined in TransactionDefinition */
043:            public static final String PREFIX_ISOLATION = "ISOLATION_";
044:
045:            /** Prefix for transaction timeout values in description strings */
046:            public static final String PREFIX_TIMEOUT = "timeout_";
047:
048:            /** Marker for read-only transactions in description strings */
049:            public static final String READ_ONLY_MARKER = "readOnly";
050:
051:            /** Constants instance for TransactionDefinition */
052:            private static final Constants constants = new Constants(
053:                    TransactionDefinition.class);
054:
055:            private int propagationBehavior = PROPAGATION_REQUIRED;
056:
057:            private int isolationLevel = ISOLATION_DEFAULT;
058:
059:            private int timeout = TIMEOUT_DEFAULT;
060:
061:            private boolean readOnly = false;
062:
063:            private String name;
064:
065:            /**
066:             * Create a new DefaultTransactionDefinition, with default settings.
067:             * Can be modified through bean property setters.
068:             * @see #setPropagationBehavior
069:             * @see #setIsolationLevel
070:             * @see #setTimeout
071:             * @see #setReadOnly
072:             * @see #setName
073:             */
074:            public DefaultTransactionDefinition() {
075:            }
076:
077:            /**
078:             * Copy constructor. Definition can be modified through bean property setters.
079:             * @see #setPropagationBehavior
080:             * @see #setIsolationLevel
081:             * @see #setTimeout
082:             * @see #setReadOnly
083:             * @see #setName
084:             */
085:            public DefaultTransactionDefinition(TransactionDefinition other) {
086:                this .propagationBehavior = other.getPropagationBehavior();
087:                this .isolationLevel = other.getIsolationLevel();
088:                this .timeout = other.getTimeout();
089:                this .readOnly = other.isReadOnly();
090:                this .name = other.getName();
091:            }
092:
093:            /**
094:             * Create a new DefaultTransactionDefinition with the the given
095:             * propagation behavior. Can be modified through bean property setters.
096:             * @param propagationBehavior one of the propagation constants in the
097:             * TransactionDefinition interface
098:             * @see #setIsolationLevel
099:             * @see #setTimeout
100:             * @see #setReadOnly
101:             */
102:            public DefaultTransactionDefinition(int propagationBehavior) {
103:                this .propagationBehavior = propagationBehavior;
104:            }
105:
106:            /**
107:             * Set the propagation behavior by the name of the corresponding constant in
108:             * TransactionDefinition, e.g. "PROPAGATION_REQUIRED".
109:             * @param constantName name of the constant
110:             * @exception IllegalArgumentException if the supplied value is not resolvable
111:             * to one of the <code>PROPAGATION_</code> constants or is <code>null</code>
112:             * @see #setPropagationBehavior
113:             * @see #PROPAGATION_REQUIRED
114:             */
115:            public final void setPropagationBehaviorName(String constantName)
116:                    throws IllegalArgumentException {
117:                if (constantName == null
118:                        || !constantName.startsWith(PREFIX_PROPAGATION)) {
119:                    throw new IllegalArgumentException(
120:                            "Only propagation constants allowed");
121:                }
122:                setPropagationBehavior(constants.asNumber(constantName)
123:                        .intValue());
124:            }
125:
126:            /**
127:             * Set the propagation behavior. Must be one of the propagation constants
128:             * in the TransactionDefinition interface. Default is PROPAGATION_REQUIRED.
129:             * @exception IllegalArgumentException if the supplied value is not
130:             * one of the <code>PROPAGATION_</code> constants
131:             * @see #PROPAGATION_REQUIRED
132:             */
133:            public final void setPropagationBehavior(int propagationBehavior) {
134:                if (!constants.getValues(PREFIX_PROPAGATION).contains(
135:                        new Integer(propagationBehavior))) {
136:                    throw new IllegalArgumentException(
137:                            "Only values of propagation constants allowed");
138:                }
139:                this .propagationBehavior = propagationBehavior;
140:            }
141:
142:            public final int getPropagationBehavior() {
143:                return this .propagationBehavior;
144:            }
145:
146:            /**
147:             * Set the isolation level by the name of the corresponding constant in
148:             * TransactionDefinition, e.g. "ISOLATION_DEFAULT".
149:             * @param constantName name of the constant
150:             * @exception IllegalArgumentException if the supplied value is not resolvable
151:             * to one of the <code>ISOLATION_</code> constants or is <code>null</code>
152:             * @see #setIsolationLevel
153:             * @see #ISOLATION_DEFAULT
154:             */
155:            public final void setIsolationLevelName(String constantName)
156:                    throws IllegalArgumentException {
157:                if (constantName == null
158:                        || !constantName.startsWith(PREFIX_ISOLATION)) {
159:                    throw new IllegalArgumentException(
160:                            "Only isolation constants allowed");
161:                }
162:                setIsolationLevel(constants.asNumber(constantName).intValue());
163:            }
164:
165:            /**
166:             * Set the isolation level. Must be one of the isolation constants
167:             * in the TransactionDefinition interface. Default is ISOLATION_DEFAULT.
168:             * @exception IllegalArgumentException if the supplied value is not
169:             * one of the <code>ISOLATION_</code> constants
170:             * @see #ISOLATION_DEFAULT
171:             */
172:            public final void setIsolationLevel(int isolationLevel) {
173:                if (!constants.getValues(PREFIX_ISOLATION).contains(
174:                        new Integer(isolationLevel))) {
175:                    throw new IllegalArgumentException(
176:                            "Only values of isolation constants allowed");
177:                }
178:                this .isolationLevel = isolationLevel;
179:            }
180:
181:            public final int getIsolationLevel() {
182:                return this .isolationLevel;
183:            }
184:
185:            /**
186:             * Set the timeout to apply, as number of seconds.
187:             * Default is TIMEOUT_DEFAULT (-1).
188:             * @see #TIMEOUT_DEFAULT
189:             */
190:            public final void setTimeout(int timeout) {
191:                if (timeout < TIMEOUT_DEFAULT) {
192:                    throw new IllegalArgumentException(
193:                            "Timeout must be a positive integer or TIMEOUT_DEFAULT");
194:                }
195:                this .timeout = timeout;
196:            }
197:
198:            public final int getTimeout() {
199:                return this .timeout;
200:            }
201:
202:            /**
203:             * Set whether to optimize as read-only transaction.
204:             * Default is "false".
205:             */
206:            public final void setReadOnly(boolean readOnly) {
207:                this .readOnly = readOnly;
208:            }
209:
210:            public final boolean isReadOnly() {
211:                return this .readOnly;
212:            }
213:
214:            /**
215:             * Set the name of this transaction. Default is none.
216:             * <p>This will be used as transaction name to be shown in a
217:             * transaction monitor, if applicable (for example, WebLogic's).
218:             */
219:            public final void setName(String name) {
220:                this .name = name;
221:            }
222:
223:            public final String getName() {
224:                return this .name;
225:            }
226:
227:            /**
228:             * This implementation compares the <code>toString()</code> results.
229:             * @see #toString()
230:             */
231:            public boolean equals(Object other) {
232:                return (other instanceof  TransactionDefinition && toString()
233:                        .equals(other.toString()));
234:            }
235:
236:            /**
237:             * This implementation returns <code>toString()</code>'s hash code.
238:             * @see #toString()
239:             */
240:            public int hashCode() {
241:                return toString().hashCode();
242:            }
243:
244:            /**
245:             * Return an identifying description for this transaction definition.
246:             * <p>The format matches the one used by
247:             * {@link org.springframework.transaction.interceptor.TransactionAttributeEditor},
248:             * to be able to feed <code>toString</code> results into bean properties of type
249:             * {@link org.springframework.transaction.interceptor.TransactionAttribute}.
250:             * <p>Has to be overridden in subclasses for correct <code>equals</code>
251:             * and <code>hashCode</code> behavior. Alternatively, {@link #equals}
252:             * and {@link #hashCode} can be overridden themselves.
253:             * @see #getDefinitionDescription()
254:             * @see org.springframework.transaction.interceptor.TransactionAttributeEditor
255:             */
256:            public String toString() {
257:                return getDefinitionDescription().toString();
258:            }
259:
260:            /**
261:             * Return an identifying description for this transaction definition.
262:             * <p>Available to subclasses, for inclusion in their <code>toString()</code> result.
263:             */
264:            protected final StringBuffer getDefinitionDescription() {
265:                StringBuffer desc = new StringBuffer();
266:                desc.append(constants.toCode(new Integer(
267:                        this .propagationBehavior), PREFIX_PROPAGATION));
268:                desc.append(',');
269:                desc.append(constants.toCode(new Integer(this .isolationLevel),
270:                        PREFIX_ISOLATION));
271:                if (this .timeout != TIMEOUT_DEFAULT) {
272:                    desc.append(',');
273:                    desc.append(PREFIX_TIMEOUT + this .timeout);
274:                }
275:                if (this .readOnly) {
276:                    desc.append(',');
277:                    desc.append(READ_ONLY_MARKER);
278:                }
279:                return desc;
280:            }
281:
282:        }
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