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/*-
* ================================================================================
* eCOMP Portal SDK
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property
* ================================================================================
* 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.openecomp.portalsdk.core.objectcache.jcs;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import java.util.Vector;
import javax.annotation.PostConstruct;
import javax.servlet.ServletContext;
import org.apache.jcs.JCS;
import org.apache.jcs.access.exception.CacheException;
import org.apache.jcs.engine.CacheConstants;
import org.apache.jcs.engine.behavior.IElementAttributes;
import org.apache.jcs.engine.control.CompositeCacheManager;
import org.openecomp.portalsdk.core.logging.logic.EELFLoggerDelegate;
import org.openecomp.portalsdk.core.objectcache.AbstractCacheManager;
import org.openecomp.portalsdk.core.service.DataAccessService;
import org.openecomp.portalsdk.core.util.SystemProperties;
import org.springframework.web.context.ServletContextAware;
public abstract class JCSCacheManager extends AbstractCacheManager implements CacheConstants, ServletContextAware {
public static String LOOKUP_OBJECT_CACHE_NAME = "lookUpObjectCache";
public static String JCS_CONFIG_FILE_PATH = "cache_config_file_path";
public static String CACHE_LOAD_ON_STARTUP = "cache_load_on_startup";
public static String CACHE_PROPERTY_VALUE_TRUE = "true";
public static String CACHE_CONTROL_SWITCH_ON = "1";
public static String CACHE_CONTROL_SWITCH_OFF = "0";
public static String CACHE_CONTROL_SWITCH = "cache_switch";
EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(JCSCacheManager.class);
private static JCS lookUpCache;
private ServletContext servletContext;
private Properties cacheConfigProperties = null;
private final Vector<String> jscManagedCacheList = new Vector<String>();
private DataAccessService dataAccessService;
public JCSCacheManager() {
super();
jscManagedCacheList.add(LOOKUP_OBJECT_CACHE_NAME);
}
@PostConstruct
public void configure() throws IOException {
super.configure();
String jcsConfigFilePath = SystemProperties.getProperty(JCS_CONFIG_FILE_PATH);
// getProperty throws if the key is missing; but check anyhow.
if (jcsConfigFilePath == null || jcsConfigFilePath.length() == 0)
throw new IOException("configure: failed to get value for config property " + JCS_CONFIG_FILE_PATH);
InputStream jcsConfigInputStream = getServletContext().getResourceAsStream(jcsConfigFilePath);
if (jcsConfigInputStream == null)
throw new IOException("configure: failed to open stream for config property " + JCS_CONFIG_FILE_PATH
+ " with name " + jcsConfigFilePath);
logger.debug(EELFLoggerDelegate.debugLogger,
"configure: loading cache properties from classpath resource {} ", jcsConfigFilePath);
Properties p = new Properties();
p.load(jcsConfigInputStream);
jcsConfigInputStream.close();
CompositeCacheManager ccm = CompositeCacheManager.getUnconfiguredInstance();
ccm.configure(p);
setCacheConfigProperties(p);
try {
initializeLookUpCache();
} catch (CacheException ce) {
throw new IOException("configure: failed to initialize lookup cache", ce);
}
}
private void initializeLookUpCache() throws CacheException {
lookUpCache = JCS.getInstance(LOOKUP_OBJECT_CACHE_NAME);
JCSCacheEventHandler eventHandler = new JCSCacheEventHandler();
IElementAttributes elementAttributes = lookUpCache.getDefaultElementAttributes();
elementAttributes.addElementEventHandler(eventHandler);
lookUpCache.setDefaultElementAttributes(elementAttributes);
if (CACHE_PROPERTY_VALUE_TRUE.equalsIgnoreCase(SystemProperties.getProperty(CACHE_LOAD_ON_STARTUP))) {
loadDataOnStartUp();
}
}
public Object getObject(String key) {
if (CACHE_CONTROL_SWITCH_ON.equalsIgnoreCase(SystemProperties.getProperty(CACHE_CONTROL_SWITCH))) {
if (lookUpCache == null)
return null;
else
return lookUpCache.get(key);
} else
return null;
}
public void putObject(String key, Object objectToCache) {
try {
if (CACHE_CONTROL_SWITCH_ON.equalsIgnoreCase(SystemProperties.getProperty(CACHE_CONTROL_SWITCH))) {
if (lookUpCache != null) {
lookUpCache.put(key, objectToCache);
}
}
} catch (CacheException ce) {
logger.error(EELFLoggerDelegate.errorLogger, "putObject: failed to put the object with key " + key, ce);
}
}
public void clearCache(String region) {
try {
if (region.equals(LOOKUP_OBJECT_CACHE_NAME))
lookUpCache.clear();
} catch (CacheException ce) {
logger.error(EELFLoggerDelegate.errorLogger,
"clearCache: failed to clear the cache for the region " + region, ce);
}
}
public void clearCache() {
clearCache(LOOKUP_OBJECT_CACHE_NAME);
}
private void loadDataOnStartUp() {
loadLookUpCache();
}
public abstract void loadLookUpCache();
public void refreshLookUpCache() {
clearCache(LOOKUP_OBJECT_CACHE_NAME);
loadLookUpCache();
}
public Properties getCacheConfigProperties() {
return cacheConfigProperties;
}
public void setCacheConfigProperties(Properties cacheConfigProperties) {
this.cacheConfigProperties = cacheConfigProperties;
}
public Vector<String> getJscManagedCacheList() {
return jscManagedCacheList;
}
public DataAccessService getDataAccessService() {
return dataAccessService;
}
public void setDataAccessService(DataAccessService dataAccessService) {
this.dataAccessService = dataAccessService;
}
public ServletContext getServletContext() {
return servletContext;
}
public void setServletContext(ServletContext servletContext) {
this.servletContext = servletContext;
}
}
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