org.openeos.wf.internal.BaseWorkflowService.java Source code

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Here is the source code for org.openeos.wf.internal.BaseWorkflowService.java

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/**
 * Copyright 2014 Fernando Rincon Martin <frm.rincon@gmail.com>
 *
 * 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.openeos.wf.internal;

import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

import org.openeos.wf.Deployment;
import org.openeos.wf.DeploymentBuilder;
import org.openeos.wf.WorkflowDefinition;
import org.openeos.wf.WorkflowEngine;
import org.openeos.wf.WorkflowService;
import org.openeos.wf.WorkflowServiceException;

public abstract class BaseWorkflowService implements WorkflowService {

    protected class DeploymentBuilderImpl implements DeploymentBuilder {

        protected boolean duplicateFiltering = false;
        protected List<URL> urlList = new ArrayList<URL>();
        protected String version = null;
        protected String key = null;

        @Override
        public DeploymentBuilder enableDuplicateFiltering() {
            duplicateFiltering = true;
            return this;
        }

        @Override
        public DeploymentBuilder addURL(URL url) {
            urlList.add(url);
            return this;
        }

        @Override
        public DeploymentBuilder version(String version) {
            this.version = version;
            return this;
        }

        @Override
        public DeploymentBuilder key(String key) {
            this.key = key;
            return this;
        }

        @Override
        public Deployment deploy() {
            return deployBuilder(this);
        }

    }

    private WorkflowServiceListenerNotificator notificator;
    private WorkflowEngine workflowEngine;

    public BaseWorkflowService(WorkflowServiceListenerNotificator notificator) {
        this.notificator = notificator;
    }

    @Override
    public DeploymentBuilder createDeployment() {
        return new DeploymentBuilderImpl();
    }

    private Deployment deployBuilder(DeploymentBuilderImpl deploymentBuilderImpl) {
        Deployment deployment = internalDeployBuilder(deploymentBuilderImpl);
        if (notificator != null) {
            notificator.notifyDeploymentAdded(deployment);
        }
        return deployment;
    }

    @Transactional(propagation = Propagation.REQUIRES_NEW)
    private Deployment internalDeployBuilder(DeploymentBuilderImpl deploymentBuilderImpl) {
        checkDeploymentIsOk(deploymentBuilderImpl);
        Deployment deployment = saveDeployment(deploymentBuilderImpl);
        for (URL url : deploymentBuilderImpl.urlList) {
            saveWorkflowDefinition(deployment, url);
        }
        return deployment;
    }

    protected abstract WorkflowDefinition saveWorkflowDefinition(Deployment deployment, URL url);

    protected abstract Deployment saveDeployment(DeploymentBuilderImpl deploymentBuilderImpl);

    protected abstract void deleteDeployment(String deploymentId);

    protected void checkDeploymentIsOk(DeploymentBuilderImpl deploymentBuilderImpl) {
        if (deploymentBuilderImpl.key == null || deploymentBuilderImpl.key.trim().length() == 0) {
            throw new WorkflowServiceException("The key has no value");
        }
        if (deploymentBuilderImpl.urlList.isEmpty()) {
            throw new WorkflowServiceException("The url list is empty");
        }
    }

    @Override
    public void revertDeployment(String deploymentId) {
        deleteDeployment(deploymentId);
        if (notificator != null) {
            notificator.notifyDeploymentRemoved(deploymentId);
        }
    }

    @Override
    public String startProcess(String processId) {
        return workflowEngine.startProcess(processId);
    }

    @Override
    public String startProcess(String processId, Map<String, Object> parameters) {
        return workflowEngine.startProcess(processId, parameters);
    }

    @Override
    public void abortProcessInstance(String processInstanceId) {
        workflowEngine.abortProcessInstance(processInstanceId);
    }

    public void bindWorkflowEngine(WorkflowEngine workflowEngine) {
        this.workflowEngine = workflowEngine;
    }

    public void unbindWorkflowEngine(WorkflowEngine workflowEngine) {
        this.workflowEngine = null;
    }

}