com.amazonaws.services.simpleworkflow.flow.WorkflowClientFactoryExternalBase Maven / Gradle / Ivy

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/*
 * Copyright 2012-2014 Amazon.com, Inc. or its affiliates. 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. A copy of the License is
 * located at
 * 
 * http://aws.amazon.com/apache2.0
 * 
 * or in the "license" file accompanying this file. This file 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.amazonaws.services.simpleworkflow.flow;

import com.amazonaws.services.simpleworkflow.AmazonSimpleWorkflow;
import com.amazonaws.services.simpleworkflow.flow.generic.GenericWorkflowClientExternal;
import com.amazonaws.services.simpleworkflow.flow.worker.GenericWorkflowClientExternalImpl;
import com.amazonaws.services.simpleworkflow.model.WorkflowExecution;

public abstract class WorkflowClientFactoryExternalBase implements WorkflowClientFactoryExternal {

    private GenericWorkflowClientExternal genericClient;

    private DataConverter dataConverter = new com.amazonaws.services.simpleworkflow.flow.JsonDataConverter();

    private StartWorkflowOptions startWorkflowOptions = new StartWorkflowOptions();

    public WorkflowClientFactoryExternalBase(AmazonSimpleWorkflow service, String domain) {
        this(new GenericWorkflowClientExternalImpl(service, domain));
    }

    public WorkflowClientFactoryExternalBase() {
        this(null);
    }

    public WorkflowClientFactoryExternalBase(GenericWorkflowClientExternal genericClient) {
        this.genericClient = genericClient;
    }

    @Override
    public GenericWorkflowClientExternal getGenericClient() {
        return genericClient;
    }

    public void setGenericClient(GenericWorkflowClientExternal genericClient) {
        this.genericClient = genericClient;
    }

    @Override
    public DataConverter getDataConverter() {
        return dataConverter;
    }

    public void setDataConverter(DataConverter dataConverter) {
        this.dataConverter = dataConverter;
    }

    @Override
    public StartWorkflowOptions getStartWorkflowOptions() {
        return startWorkflowOptions;
    }

    public void setStartWorkflowOptions(StartWorkflowOptions startWorkflowOptions) {
        this.startWorkflowOptions = startWorkflowOptions;
    }

    @Override
    public T getClient() {
        checkGenericClient();
        String workflowId = genericClient.generateUniqueId();
        WorkflowExecution workflowExecution = new WorkflowExecution().withWorkflowId(workflowId);
        return getClient(workflowExecution, startWorkflowOptions, dataConverter, genericClient);
    }

    @Override
    public T getClient(String workflowId) {
        if (workflowId == null || workflowId.isEmpty()) {
            throw new IllegalArgumentException("workflowId");
        }
        WorkflowExecution workflowExecution = new WorkflowExecution().withWorkflowId(workflowId);
        return getClient(workflowExecution, startWorkflowOptions, dataConverter, genericClient);
    }

    @Override
    public T getClient(WorkflowExecution workflowExecution) {
        return getClient(workflowExecution, startWorkflowOptions, dataConverter, genericClient);
    }

    @Override
    public T getClient(WorkflowExecution workflowExecution, StartWorkflowOptions options) {
        return getClient(workflowExecution, options, dataConverter, genericClient);
    }

    @Override
    public T getClient(WorkflowExecution workflowExecution, StartWorkflowOptions options, DataConverter dataConverter) {
        return getClient(workflowExecution, options, dataConverter, genericClient);
    }

    @Override
    public T getClient(WorkflowExecution workflowExecution, StartWorkflowOptions options, DataConverter dataConverter,
            GenericWorkflowClientExternal genericClient) {
        checkGenericClient();
        return createClientInstance(workflowExecution, options, dataConverter, genericClient);
    }

    private void checkGenericClient() {
        if (genericClient == null) {
            throw new IllegalStateException("The required property genericClient is null. "
                    + "It could be caused by instantiating the factory through the default constructor instead of the one "
                    + "that takes service and domain arguments.");
        }
    }

    protected abstract T createClientInstance(WorkflowExecution workflowExecution, StartWorkflowOptions options,
            DataConverter dataConverter, GenericWorkflowClientExternal genericClient);

}