diff options
Diffstat (limited to 'branches/sca-java-20080910/modules/core/src/main/java/org/apache/tuscany/sca/core/store/MemoryStore.java')
-rw-r--r-- | branches/sca-java-20080910/modules/core/src/main/java/org/apache/tuscany/sca/core/store/MemoryStore.java | 195 |
1 files changed, 0 insertions, 195 deletions
diff --git a/branches/sca-java-20080910/modules/core/src/main/java/org/apache/tuscany/sca/core/store/MemoryStore.java b/branches/sca-java-20080910/modules/core/src/main/java/org/apache/tuscany/sca/core/store/MemoryStore.java deleted file mode 100644 index 5b838116c5..0000000000 --- a/branches/sca-java-20080910/modules/core/src/main/java/org/apache/tuscany/sca/core/store/MemoryStore.java +++ /dev/null @@ -1,195 +0,0 @@ -/* - * Licensed to the Apache Software Foundation (ASF) under one - * or more contributor license agreements. See the NOTICE file - * distributed with this work for additional information - * regarding copyright ownership. The ASF licenses this file - * to you 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.apache.tuscany.sca.core.store; - -import java.util.Map; -import java.util.concurrent.ConcurrentHashMap; -import java.util.concurrent.Executors; -import java.util.concurrent.ScheduledExecutorService; -import java.util.concurrent.TimeUnit; - -import org.apache.tuscany.sca.core.event.BaseEventPublisher; -import org.apache.tuscany.sca.runtime.RuntimeComponent; -import org.apache.tuscany.sca.store.DuplicateRecordException; -import org.apache.tuscany.sca.store.RecoveryListener; -import org.apache.tuscany.sca.store.Store; -import org.apache.tuscany.sca.store.StoreExpirationEvent; -import org.apache.tuscany.sca.store.StoreMonitor; -import org.apache.tuscany.sca.store.StoreWriteException; -import org.osoa.sca.annotations.Destroy; -import org.osoa.sca.annotations.EagerInit; -import org.osoa.sca.annotations.Init; -import org.osoa.sca.annotations.Property; -import org.osoa.sca.annotations.Service; - -/** - * Implements a non-durable, non-transactional store using a simple in-memory map - * - * @version $Rev$ $Date$ - */ -@Service(Store.class) -@EagerInit -public class MemoryStore extends BaseEventPublisher implements Store { - private Map<RuntimeComponent, Map<String, Record>> store; - // TODO integrate with a core threading scheme - private ScheduledExecutorService scheduler; - private long reaperInterval = 300000; - private StoreMonitor monitor; - private long defaultExpirationOffset = 600000; // 10 minutes - - public MemoryStore(StoreMonitor monitor) { - this.monitor = monitor; - this.store = new ConcurrentHashMap<RuntimeComponent, Map<String, Record>>(); - this.scheduler = Executors.newSingleThreadScheduledExecutor(); - } - - /** - * Returns the maximum default expiration offset for records in the store - * - * @return the maximum default expiration offset for records in the store - */ - public long getDefaultExpirationOffset() { - return defaultExpirationOffset; - } - - /** - * Sets the maximum default expiration offset for records in the store - */ - @Property - public void setDefaultExpirationOffset(long defaultExpirationOffset) { - this.defaultExpirationOffset = defaultExpirationOffset; - } - - /** - * Sets the interval for expired entry scanning to be performed - */ - @Property - public void setReaperInterval(long reaperInterval) { - this.reaperInterval = reaperInterval; - } - - public long getReaperInterval() { - return reaperInterval; - } - - @Init - public void init() { - scheduler.scheduleWithFixedDelay(new Reaper(), reaperInterval, reaperInterval, TimeUnit.MILLISECONDS); - monitor.start("In-memory store started"); - } - - @Destroy - public void destroy() { - scheduler.shutdown(); - monitor.stop("In-memory store stopped"); - } - - public void insertRecord(RuntimeComponent owner, String id, Object object, long expiration) throws StoreWriteException { - Map<String, Record> map = store.get(owner); - if (map == null) { - map = new ConcurrentHashMap<String, Record>(); - store.put(owner, map); - } - if (map.containsKey(id)) { - throw new DuplicateRecordException("Duplicate record: " + owner.getURI() +" : " + id); - } - map.put(id, new Record(object, expiration)); - } - - public void updateRecord(RuntimeComponent owner, String id, Object object, long expiration) throws StoreWriteException { - Map<String, Record> map = store.get(owner); - if (map == null) { - throw new StoreWriteException("Record not found: " + owner.getURI() +" : " + id); - } - Record record = map.get(id); - if (record == null) { - throw new StoreWriteException("Record not found: " + owner.getURI() +" : " + id); - } - record.data = object; - } - - public Object readRecord(RuntimeComponent owner, String id) { - Map<String, Record> map = store.get(owner); - if (map == null) { - return null; - } - Record record = map.get(id); - if (record != null) { - return record.data; - } - return null; - } - - public void removeRecords() { - store.clear(); - } - - public void removeRecord(RuntimeComponent owner, String id) throws StoreWriteException { - Map<String, Record> map = store.get(owner); - if (map == null) { - throw new StoreWriteException("Owner not found: " + owner.getURI() +" : " + id); - } - if (map.remove(id) == null) { - throw new StoreWriteException("Owner not found: " + owner.getURI() +" : " + id); - } - } - - public void recover(RecoveryListener listener) { - throw new UnsupportedOperationException(); - } - - private class Record { - private Object data; - private long expiration = NEVER; - - public Record(Object data, long expiration) { - this.data = data; - this.expiration = expiration; - } - - public Object getData() { - return data; - } - - public long getExpiration() { - return expiration; - } - } - - private class Reaper implements Runnable { - - public void run() { - long now = System.currentTimeMillis(); - for (Map.Entry<RuntimeComponent, Map<String, Record>> entries : store.entrySet()) { - for (Map.Entry<String, Record> entry : entries.getValue().entrySet()) { - final long expiration = entry.getValue().expiration; - if (expiration != NEVER && now >= expiration) { - RuntimeComponent owner = entries.getKey(); - Object instance = entry.getValue().getData(); - // notify listeners of the expiration - StoreExpirationEvent event = new StoreExpirationEvent(this, owner, instance); - publish(event); - entries.getValue().remove(entry.getKey()); - } - } - } - } - } - -} |