/*
* Copyright 2016 Red Hat, Inc. and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
*
* 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.kie.server.services.casemgmt.locator;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.NoResultException;
import javax.persistence.NonUniqueResultException;
import org.jbpm.runtime.manager.impl.jpa.EntityManagerFactoryManager;
import org.kie.server.api.KieServerConstants;
import org.kie.server.services.api.ContainerLocator;
import org.kie.server.services.api.KieContainerInstance;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Locates container id for given case id.
* To improve performance the operation of locating the container id is done only once
* and stored as part of the instance of this class so in case of multiple method calls will require it
* single instance of this class should be used to avoid too many look ups.
*/
public class ByCaseIdContainerLocator implements ContainerLocator {
private static final Logger logger = LoggerFactory.getLogger(ByCaseIdContainerLocator.class);
private static final String CONTAINER_ID_QUERY = "select log.externalId from ProcessInstanceLog log where log.correlationKey = :caseId";
private String caseId;
private String containerId;
public ByCaseIdContainerLocator(String caseId) {
this.caseId = caseId;
}
@Override
public String locateContainer(String alias, List<? extends KieContainerInstance> containerInstances) {
if (containerId != null) {
logger.debug("Container id has already been found for case {} and is {}", caseId, containerId);
return containerId;
}
logger.debug("Searching for container id for case id {} and alias {}", caseId, alias);
EntityManager em = EntityManagerFactoryManager.get().getOrCreate(KieServerConstants.KIE_SERVER_PERSISTENCE_UNIT_NAME).createEntityManager();
try {
containerId = (String)em.createQuery(CONTAINER_ID_QUERY)
.setParameter("caseId", caseId)
.getSingleResult();
logger.debug("Found container id '{}' for case id {}", containerId, caseId);
return containerId;
} catch (NoResultException | NonUniqueResultException e) {
throw new IllegalArgumentException("Case with id " + caseId + " not found");
} finally {
em.close();
}
}
}