net.sf.jkniv.camel.sap.jco3.SapJcoComponent Maven / Gradle / Ivy

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Camel to SAP Java Connector standalone 3.0
There is a newer version: 2.20.0
/*
 * Copyright 2017 the original author or authors.
 *
 * 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 net.sf.jkniv.camel.sap.jco3;

import java.util.Map;
import java.util.Properties;

import org.apache.camel.CamelContext;
import org.apache.camel.Endpoint;
import org.apache.camel.RuntimeCamelException;
import org.apache.camel.impl.UriEndpointComponent;
import org.apache.camel.util.CamelContextHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Represents the component that manages {@link SapJcoEndpoint}.
 */
public class SapJcoComponent extends UriEndpointComponent
{
    private static final Logger LOG = LoggerFactory.getLogger(SapJcoComponent.class);
    private static final SapJcoDestinationDataProvider myProvider  = new SapJcoDestinationDataProvider(); 
    
    public SapJcoComponent()
    {
        super(SapJcoEndpoint.class);
    }
    
    public SapJcoComponent(CamelContext context)
    {
        super(context, SapJcoEndpoint.class);
    }
    
    protected Endpoint createEndpoint(String uri, String remaining, Map parameters) throws Exception
    {
        SapJcoEndpoint endpoint = new SapJcoEndpoint(uri, this);
        Properties prop = lookup(remaining);
        setProperties(endpoint, parameters);
        endpoint.setPropSapConnection(prop);
        register();
        return endpoint;
    }
    
    private Properties lookup(String remaining)
    {
        Properties prop = null;
        Object resource = JndiResources.lookup(remaining);
        if (resource != null)
        {
            if (resource instanceof Properties)
                prop = (Properties) resource;
            else
                throw new RuntimeCamelException("Resource with name [" + remaining
                        + "] must be an instance of java.util.Properties to connect with Sap JCo");
        }
        else
        {
            prop = CamelContextHelper.mandatoryLookup(getCamelContext(), remaining, Properties.class);
            LOG.info("lookup successfully properties in camel context [" + remaining + "]");
        }
        return prop;
    }
    
    @Override
    protected void doShutdown() throws Exception
    {
        unregistryDataProvider();
        super.doShutdown();
    }
    
    @Override
    protected void doStop() throws Exception
    {
        unregistryDataProvider();
        super.doStop();
    }
    
    
    private void unregistryDataProvider()
    {
        try
        {
            if (com.sap.conn.jco.ext.Environment.isDestinationDataProviderRegistered())
            {
                com.sap.conn.jco.ext.Environment.unregisterDestinationDataProvider(myProvider);
                LOG.info("Destination Data Provider was unregistered [{}] successfully.", myProvider);
            }
        }
        catch (IllegalStateException providerAlreadyRegisteredException)
        {
            LOG.error("Cannot deregister the DestinationDataProvider", providerAlreadyRegisteredException);
            //somebody else registered its implementation, 
            //stop the execution
        }
    }
    
    
    static void register()
    {
        if (!myProvider.isRegistered())
        {
            //register the prsbovider with the JCo environment;
            //catch IllegalStateException if an instance is already registered
            try
            {
                if (!com.sap.conn.jco.ext.Environment.isDestinationDataProviderRegistered())
                {
                    com.sap.conn.jco.ext.Environment.registerDestinationDataProvider(myProvider);
                    LOG.info("Destination Data Provider was register [{}] successfully.", myProvider);
                }
            }
            catch (IllegalStateException providerAlreadyRegisteredException)
            {
                //somebody else registered its implementation, 
                //stop the execution
                throw new Error(providerAlreadyRegisteredException);
            }
            //set properties for the destination and ...
        }
    }
    
    static void setProperty(String destName, Properties props)
    {
        if (!myProvider.hasDestName(destName))
            myProvider.changeProperties(destName, props);
    }
}