/*
* Copyright (c) 2013 S.C. Axemblr Software Solutions S.R.L
*
* 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 com.axemblr.provisionr.core.activities;
import com.axemblr.provisionr.api.pool.Machine;
import com.axemblr.provisionr.api.pool.Pool;
import com.axemblr.provisionr.core.CoreConstants;
import com.axemblr.provisionr.core.CoreProcessVariables;
import static com.google.common.base.Preconditions.checkNotNull;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Lists;
import java.util.List;
import org.activiti.engine.ProcessEngine;
import org.activiti.engine.delegate.DelegateExecution;
import org.activiti.engine.delegate.JavaDelegate;
import org.activiti.engine.runtime.ProcessInstance;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Create an Activiti process for each machine and store the process IDs
*/
public class SpawnProcessForEachMachine implements JavaDelegate {
private static final Logger LOG = LoggerFactory.getLogger(SpawnProcessForEachMachine.class);
/**
* Name of the process variable that stores a {@link com.axemblr.provisionr.api.pool.Machine Machine} object.
* Used inside the process to connect to that machine.
*/
private static final String MACHINE = "machine";
private final ProcessEngine processEngine;
private final String processKey;
private final String type;
private final String resultVariable;
public SpawnProcessForEachMachine(
ProcessEngine processEngine, String processKey, String type, String resultVariable
) {
this.processEngine = checkNotNull(processEngine, "processEngine is null");
this.processKey = checkNotNull(processKey, "processKey is null");
this.type = checkNotNull(type, "type is null");
this.resultVariable = checkNotNull(resultVariable, "resultVariable is null");
}
@Override
public void execute(DelegateExecution execution) throws Exception {
final Pool pool = (Pool) execution.getVariable(CoreProcessVariables.POOL);
checkNotNull(pool, "Expecting to find a pool description as process variable");
@SuppressWarnings("unchecked")
List<Machine> machines = (List<Machine>) execution.getVariable(CoreProcessVariables.MACHINES);
checkNotNull(machines, "Expecting to find the list of machines as process variable");
final String poolBusinessKey = String.class.cast(execution.getVariable(CoreProcessVariables.POOL_BUSINESS_KEY));
checkNotNull(poolBusinessKey, "No way to link sub-processes to master process, poolBusinessKey is null");
/* Authenticate as kermit to make the process visible in the Explorer UI */
processEngine.getIdentityService().setAuthenticatedUserId(CoreConstants.ACTIVITI_EXPLORER_DEFAULT_USER);
List<String> processIds = Lists.newArrayList();
for (Machine machine : machines) {
final String perMachineProcessBusinessKey = String.format("%s-%s-%s",
execution.getProcessBusinessKey(), type, machine.getExternalId());
ProcessInstance perMachineProcess = processEngine.getRuntimeService().startProcessInstanceByKey(
processKey, perMachineProcessBusinessKey,
ImmutableMap.<String, Object>of(CoreProcessVariables.POOL, pool,
CoreProcessVariables.POOL_BUSINESS_KEY, poolBusinessKey,
MACHINE, machine));
LOG.info("Started background '" + type + "' process {} ({}) for machine {}",
new Object[]{perMachineProcessBusinessKey, perMachineProcess.getId(), machine.getExternalId()});
processIds.add(perMachineProcess.getId());
}
LOG.info("Saving process IDs {} as {}", processIds, resultVariable);
execution.setVariable(resultVariable, processIds);
}
}