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/*-
* ============LICENSE_START=======================================================
* feature-state-management
* ================================================================================
* Copyright (C) 2017-2019 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.drools.statemanagement;
import java.io.IOException;
import java.util.Observer;
import java.util.Properties;
import org.onap.policy.common.im.AllSeemsWellException;
import org.onap.policy.common.im.StateManagement;
import org.onap.policy.drools.core.PolicySessionFeatureApi;
import org.onap.policy.drools.features.PolicyEngineFeatureApi;
import org.onap.policy.drools.utils.PropertyUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* If this feature is supported, there is a single instance of it.
* It adds persistence to Drools sessions, but it is also intertwined with
* active/standby state management and IntegrityMonitor. For now, they are
* all treated as a single feature, but it would be nice to separate them.
*
* <p>The bulk of the code here was once in other classes, such as
* 'PolicyContainer' and 'Main'. It was moved here as part of making this
* a separate optional feature.
*/
public class StateManagementFeature implements StateManagementFeatureApi,
PolicySessionFeatureApi, PolicyEngineFeatureApi {
// get an instance of logger
private static final Logger logger =
LoggerFactory.getLogger(StateManagementFeature.class);
private DroolsPdpIntegrityMonitor droolsPdpIntegrityMonitor = null;
private StateManagement stateManagement = null;
public StateManagementFeature() {
logger.debug("StateManagementFeature() constructor");
}
@Override
public void globalInit(String[] args, String configDir) {
// Initialization code associated with 'PolicyContainer'
logger.debug("StateManagementFeature.globalInit({}) entry", configDir);
try {
droolsPdpIntegrityMonitor = DroolsPdpIntegrityMonitor.init(configDir);
} catch (Exception e) {
logger.debug("DroolsPDPIntegrityMonitor initialization exception: ", e);
logger.error("DroolsPDPIntegrityMonitor.init()", e);
}
initializeProperties(configDir);
//At this point the DroolsPDPIntegrityMonitor instance must exist. Let's check it.
try {
droolsPdpIntegrityMonitor = DroolsPdpIntegrityMonitor.getInstance();
stateManagement = droolsPdpIntegrityMonitor.getStateManager();
if (stateManagement == null) {
logger.debug("StateManagementFeature.globalInit(): stateManagement is NULL!");
}
else {
logger.debug("StateManagementFeature.globalInit(): "
+ "stateManagement.getAdminState(): {}", stateManagement.getAdminState());
}
} catch (Exception e1) {
logger.debug("StateManagementFeature.globalInit(): DroolsPDPIntegrityMonitor"
+ " initialization failed with exception:", e1);
logger.error("DroolsPDPIntegrityMonitor.init(): StateManagementFeature startup failed "
+ "to get DroolsPDPIntegrityMonitor instance:", e1);
}
}
/**
* {@inheritDoc}.
*/
@Override
public void addObserver(Observer stateChangeObserver) {
logger.debug("StateManagementFeature.addObserver() entry\n"
+ "StateManagementFeature.addObserver(): "
+ "stateManagement.getAdminState(): {}", stateManagement.getAdminState());
stateManagement.addObserver(stateChangeObserver);
logger.debug("StateManagementFeature.addObserver() exit");
}
/**
* {@inheritDoc}.
*/
@Override
public String getAdminState() {
return stateManagement.getAdminState();
}
/**
* {@inheritDoc}.
*/
@Override
public String getOpState() {
return stateManagement.getOpState();
}
/**
* {@inheritDoc}.
*/
@Override
public String getAvailStatus() {
return stateManagement.getAvailStatus();
}
/**
* {@inheritDoc}.
*/
@Override
public String getStandbyStatus() {
return stateManagement.getStandbyStatus();
}
/**
* {@inheritDoc}.
*/
@Override
public String getStandbyStatus(String resourceName) {
return stateManagement.getStandbyStatus(resourceName);
}
/**
* {@inheritDoc}.
*/
@Override
public void disableFailed(String resourceName) throws Exception {
stateManagement.disableFailed(resourceName);
}
/**
* {@inheritDoc}.
*/
@Override
public void disableFailed() throws Exception {
stateManagement.disableFailed();
}
/**
* {@inheritDoc}.
*/
@Override
public void promote() throws Exception {
stateManagement.promote();
}
/**
* {@inheritDoc}.
*/
@Override
public void demote() throws Exception {
stateManagement.demote();
}
/**
* {@inheritDoc}.
*/
@Override
public String getResourceName() {
return StateManagementProperties.getProperty(StateManagementProperties.NODE_NAME);
}
/**
* {@inheritDoc}.
*
* @return true if locked or false if failed
*/
@Override
public boolean lock() {
try {
stateManagement.lock();
} catch (Exception e) {
logger.error("StateManagementFeature.lock() failed with exception: {}", e);
return false;
}
return true;
}
/**
* {@inheritDoc}.
*
* @throws Exception exception
*/
@Override
public boolean unlock() {
try {
stateManagement.unlock();
} catch (Exception e) {
logger.error("StateManagementFeature.unlock() failed with exception: {}", e);
return false;
}
return true;
}
/**
* {@inheritDoc}.
*
* @throws Exception exception
*/
@Override
public boolean isLocked() {
return StateManagement.LOCKED.equals(stateManagement.getAdminState());
}
@Override
public int getSequenceNumber() {
return SEQ_NUM;
}
/**
* Read in the properties and initialize the StateManagementProperties.
*/
private static void initializeProperties(String configDir) {
//Get the state management properties
try {
Properties props =
PropertyUtil.getProperties(configDir + "/feature-state-management.properties");
StateManagementProperties.initProperties(props);
logger.info("initializeProperties: resourceName= {}",
StateManagementProperties.getProperty(StateManagementProperties.NODE_NAME));
} catch (IOException e1) {
logger.error("initializeProperties", e1);
}
}
@Override
public void allSeemsWell(String key, Boolean asw, String msg)
throws AllSeemsWellException {
droolsPdpIntegrityMonitor.allSeemsWell(key, asw, msg);
}
}
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