KillMachineSetUpProcesses.java

/*
 * 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.provisionr.core.activities;

import static com.google.common.base.Preconditions.checkNotNull;
import com.google.common.base.Predicate;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import java.util.List;
import org.activiti.engine.RuntimeService;
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;

public class KillMachineSetUpProcesses implements JavaDelegate {

    private static final Logger LOG = LoggerFactory.getLogger(KillMachineSetUpProcesses.class);

    private RuntimeService runtimeService;
    private String variableWithProcessIds;

    public KillMachineSetUpProcesses(RuntimeService runtimeService, String variableWithProcessIds) {
        this.runtimeService = checkNotNull(runtimeService, "runtimeService is null");
        this.variableWithProcessIds = checkNotNull(variableWithProcessIds, "variableWithProcessIds is null");
    }

    @Override
    public void execute(DelegateExecution execution) {
        @SuppressWarnings("unchecked")
        List<String> processIds = (List<String>) execution.getVariable(variableWithProcessIds);

        List<String> forceEnded = Lists.newArrayList(Iterables.filter(processIds,
            new Predicate<String>() {
                @Override
                public boolean apply(String processInstanceId) {
                    ProcessInstance instance = runtimeService.createProcessInstanceQuery()
                        .processInstanceId(processInstanceId).singleResult();
                    if (instance != null && !instance.isEnded()) {
                        runtimeService.deleteProcessInstance(processInstanceId,
                            "Pending process needs to be killed");
                        return true;
                    }
                    return false;
                }
            }));

        LOG.warn("Killed pending machine setup processes: {}", forceEnded);
    }
}