--- /dev/null
+<ehcache>
+
+ <!-- Sets the path to the directory where cache .data files are created.
+
+ If the path is a Java System Property it is replaced by
+ its value in the running VM.
+
+ The following properties are translated:
+ user.home - User's home directory
+ user.dir - User's current working directory
+ java.io.tmpdir - Default temp file path -->
+ <diskStore path="java.io.tmpdir"/>
+
+
+ <!--Default Cache configuration. These will applied to caches programmatically created through
+ the CacheManager.
+
+ The following attributes are required:
+
+ maxElementsInMemory - Sets the maximum number of objects that will be created in memory
+ eternal - Sets whether elements are eternal. If eternal, timeouts are ignored and the
+ element is never expired.
+ overflowToDisk - Sets whether elements can overflow to disk when the in-memory cache
+ has reached the maxInMemory limit.
+
+ The following attributes are optional:
+ timeToIdleSeconds - Sets the time to idle for an element before it expires.
+ i.e. The maximum amount of time between accesses before an element expires
+ Is only used if the element is not eternal.
+ Optional attribute. A value of 0 means that an Element can idle for infinity.
+ The default value is 0.
+ timeToLiveSeconds - Sets the time to live for an element before it expires.
+ i.e. The maximum time between creation time and when an element expires.
+ Is only used if the element is not eternal.
+ Optional attribute. A value of 0 means that and Element can live for infinity.
+ The default value is 0.
+ diskPersistent - Whether the disk store persists between restarts of the Virtual Machine.
+ The default value is false.
+ diskExpiryThreadIntervalSeconds- The number of seconds between runs of the disk expiry thread. The default value
+ is 120 seconds.
+ -->
+
+ <defaultCache
+ maxElementsInMemory="10000"
+ eternal="false"
+ overflowToDisk="false"
+ timeToIdleSeconds="5"
+ timeToLiveSeconds="5"
+ diskPersistent="false"
+ diskExpiryThreadIntervalSeconds="120"
+ />
+
+ <cache
+ name="test"
+ maxElementsInMemory="10000"
+ eternal="false"
+ overflowToDisk="false"
+ timeToIdleSeconds="5"
+ timeToLiveSeconds="5"
+ diskPersistent="false"
+ diskExpiryThreadIntervalSeconds="120"
+ />
+
+</ehcache>
--- /dev/null
+/*
+ * Copyright 2005 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.wamblee.cache;
+
+import java.io.IOException;
+
+import junit.framework.TestCase;
+import net.sf.ehcache.CacheException;
+
+import org.wamblee.io.TestResource;
+import org.wamblee.test.TimingUtils;
+
+/**
+ * Cached object test.
+ */
+public class CachedObjectTest extends TestCase {
+
+ /**
+ *
+ */
+ private static final String EHCACHE_CONFIG = "ehcache.xml";
+
+ private static final int OBJECT_KEY = 10;
+
+ private CachedObject.Computation<Integer,Integer> _computation;
+ private int _ncomputations;
+
+ /* (non-Javadoc)
+ * @see junit.framework.TestCase#setUp()
+ */
+ @Override
+ protected void setUp() throws Exception {
+ super.setUp();
+ _computation = new CachedObject.Computation<Integer,Integer>() {
+ public Integer getObject(Integer aObjectKey) {
+ _ncomputations++;
+ return compute(aObjectKey);
+ };
+ };
+ _ncomputations = 0;
+ }
+
+ private int compute(int aValue) {
+ return aValue + 10;
+ }
+
+ private CachedObject<Integer, Integer> createCached(Cache aCache) {
+ return new CachedObject<Integer, Integer>(aCache, OBJECT_KEY, _computation);
+ }
+
+ /**
+ * Verifies that upon first use, the cached object uses the computation to
+ * retrieve the object.
+ *
+ */
+ public void testComputation() {
+ CachedObject<Integer, Integer> cached = createCached(new ZeroCache());
+ int value = cached.get();
+ assertEquals(compute(OBJECT_KEY), value);
+ assertEquals(1, _ncomputations);
+ }
+
+ public void testInvalidateCache() {
+ CachedObject<Integer, Integer> cached = createCached(new ForeverCache());
+ int value = cached.get();
+ assertEquals(compute(OBJECT_KEY), value);
+ assertEquals(1, _ncomputations);
+ cached.invalidate();
+ value = cached.get();
+ assertEquals(compute(OBJECT_KEY), value);
+ assertEquals(2, _ncomputations);
+ }
+
+ public void testBehaviorEhCache() throws CacheException, IOException {
+ Cache cache = new EhCache(new TestResource(CachedObjectTest.class, EHCACHE_CONFIG), "test");
+ CachedObject<Integer, Integer> cached = createCached(cache);
+
+ assertTrue( cache == cached.getCache());
+ int value = cached.get();
+ assertEquals(compute(OBJECT_KEY), value);
+ assertEquals(1, _ncomputations);
+ // The value must still be cached.
+ value = cached.get();
+ assertEquals(compute(OBJECT_KEY), value);
+ assertEquals(1, _ncomputations);
+
+ // Cache expiry.
+ TimingUtils.sleep(6000);
+ value = cached.get();
+ assertEquals(compute(OBJECT_KEY), value);
+ assertEquals(2, _ncomputations);
+
+ // Should still be cached now.
+ value = cached.get();
+ assertEquals(compute(OBJECT_KEY), value);
+ assertEquals(2, _ncomputations);
+
+ // explicit invalidation.
+ cached.invalidate();
+ value = cached.get();
+ assertEquals(compute(OBJECT_KEY), value);
+ assertEquals(3, _ncomputations);
+
+ }
+
+ public void testBehaviorEhCacheDefault() throws CacheException, IOException {
+ Cache cache = new EhCache(new TestResource(CachedObjectTest.class, EHCACHE_CONFIG), "undefined");
+ CachedObject<Integer, Integer> cached = createCached(cache);
+
+ assertTrue( cache == cached.getCache());
+ int value = cached.get();
+ assertEquals(compute(OBJECT_KEY), value);
+ assertEquals(1, _ncomputations);
+ // The value must still be cached.
+ value = cached.get();
+ assertEquals(compute(OBJECT_KEY), value);
+ assertEquals(1, _ncomputations);
+
+ // Cache expiry.
+ TimingUtils.sleep(6000);
+ value = cached.get();
+ assertEquals(compute(OBJECT_KEY), value);
+ assertEquals(2, _ncomputations);
+
+ // Should still be cached now.
+ value = cached.get();
+ assertEquals(compute(OBJECT_KEY), value);
+ assertEquals(2, _ncomputations);
+
+ }
+
+
+ public void testBehaviorForeverCache() {
+ CachedObject<Integer, Integer> cached = createCached(new ForeverCache());
+ int value = cached.get();
+ assertEquals(compute(OBJECT_KEY), value);
+ assertEquals(1, _ncomputations);
+ for (int ncomp = 2; ncomp <= 100; ncomp++) {
+ value = cached.get();
+ assertEquals(compute(OBJECT_KEY), value);
+ assertEquals(1, _ncomputations);
+ }
+ }
+
+ public void testBehaviorZeroCache() {
+ CachedObject<Integer, Integer> cached = createCached(new ZeroCache());
+ int value = cached.get();
+ assertEquals(compute(OBJECT_KEY), value);
+ assertEquals(1, _ncomputations);
+ for (int ncomp = 2; ncomp <= 100; ncomp++) {
+ value = cached.get();
+ assertEquals(compute(OBJECT_KEY), value);
+ assertEquals(ncomp, _ncomputations);
+ }
+ cached.invalidate();
+ value = cached.get();
+ assertEquals(compute(OBJECT_KEY), value);
+ assertEquals(101, _ncomputations);
+ }
+}
--- /dev/null
+/*
+ * Copyright 2005 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.wamblee.io;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+
+import org.wamblee.test.FileSystemUtils;
+
+/**
+ * Test resource for locating resources in the classpath.
+ */
+public class TestResource extends FileResource {
+
+ /**
+ * Test class name.
+ * @param aTestClass Test class.
+ * @param aName Name of the file to look for.
+ */
+ public TestResource(Class aTestClass, String aName) {
+ super(getFile(aTestClass, aName));
+ }
+
+ /**
+ * Computes the file path of the file to look for.
+ * @param aClass Test class name.
+ * @param aName Name of the file.
+ * @return File.
+ */
+ private static File getFile(Class aClass, String aName) {
+ File dir = FileSystemUtils.getTestInputDir(aClass);
+ return new File(dir, aName);
+ }
+
+}
git://wamblee.org / utils / commitdiff