com.almende.eve.transport.LocalTransportBuilder.java Source code

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Here is the source code for com.almende.eve.transport.LocalTransportBuilder.java

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/*
 * Copyright: Almende B.V. (2014), Rotterdam, The Netherlands
 * License: The Apache Software License, Version 2.0
 */
package com.almende.eve.transport;

import java.io.IOException;
import java.net.URI;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.logging.Logger;

import com.almende.eve.capabilities.AbstractCapabilityBuilder;
import com.almende.eve.capabilities.handler.Handler;
import com.almende.util.URIUtil;
import com.fasterxml.jackson.databind.node.ObjectNode;

/**
 * The Class LocalTransportBuilder.
 */
public class LocalTransportBuilder extends AbstractCapabilityBuilder<Transport> {
    private static final Logger LOG = Logger.getLogger(LocalTransportBuilder.class.getName());
    private static final Map<URI, LocalService> INSTANCES = new ConcurrentHashMap<URI, LocalService>(10);

    @Override
    public Transport build() {
        final Handler<Receiver> newHandle = Transport.TYPEUTIL.inject(getHandle());
        final LocalTransportConfig config = LocalTransportConfig.decorate(getParams());
        final String id = config.getId();
        if (id == null) {
            LOG.warning("Parameter 'id' is required!");
            return null;
        }
        final String addr = "local:" + config.getId();
        final URI address = URIUtil.create(addr.intern());
        LocalService result = getLocal(address);
        if (result == null) {
            result = new LocalService(address, newHandle, getParams());
            INSTANCES.put(address, result);
        } else {
            result.getHandle().update(newHandle);
        }
        return result;
    }

    /**
     * Gets the local.
     * 
     * @param address
     *            the address
     * @return the local
     */
    public LocalService getLocal(final URI address) {
        return INSTANCES.get(address);
    }

    /**
     * The Class LocalService.
     */
    class LocalService extends AbstractTransport implements TransportService {
        /**
         * Instantiates a new local transport.
         * 
         * @param address
         *            the address
         * @param handle
         *            the handle
         * @param params
         *            the params
         */
        public LocalService(final URI address, final Handler<Receiver> handle, final ObjectNode params) {
            super(address, handle, null, params);
            setService(this);
        }

        private LocalService() {
            super(null, null, null, null);
        }

        /*
         * (non-Javadoc)
         * @see
         * com.almende.eve.transport.TransportService#getLocal(java.net.URI)
         */
        @Override
        public LocalService getLocal(final URI address) {
            return INSTANCES.get(address);
        }

        /*
         * (non-Javadoc)
         * @see com.almende.eve.transport.Transport#send(java.net.URI,
         * java.lang.String, java.lang.String)
         */
        @Override
        public void send(final URI receiverUri, final String message, final String tag) throws IOException {
            sendLocal(receiverUri, message);
        }

        /*
         * (non-Javadoc)
         * @see com.almende.eve.transport.Transport#send(java.net.URI, byte[],
         * java.lang.String)
         */
        @Override
        public void send(final URI receiverUri, final byte[] message, final String tag) throws IOException {
            sendLocal(receiverUri, message);
        }

        /*
         * (non-Javadoc)
         * @see com.almende.eve.transport.Transport#send(java.net.URI, byte[],
         * java.lang.String)
         */
        @Override
        public void send(final URI receiverUri, final Object message, final String tag) throws IOException {
            sendLocal(receiverUri, message);
        }

        /*
         * (non-Javadoc)
         * @see com.almende.eve.transport.Transport#connect()
         */
        /**
         * Connect.
         * 
         * @throws IOException
         *             Signals that an I/O exception has occurred.
         */
        @Override
        public void connect() throws IOException {
        }

        /*
         * (non-Javadoc)
         * @see com.almende.eve.transport.Transport#disconnect()
         */
        /**
         * Disconnect.
         */
        @Override
        public void disconnect() {
        }

        /*
         * (non-Javadoc)
         * @see com.almende.eve.transport.Transport#getProtocols()
         */
        /**
         * Gets the protocols.
         * 
         * @return the protocols
         */
        @Override
        public List<String> getProtocols() {
            return Arrays.asList("local");
        }

        /*
         * (non-Javadoc)
         * @see
         * com.almende.eve.transport.TransportService#delete(com.almende.eve.
         * transport
         * .Transport)
         */
        @Override
        public void delete(final Transport instance) {
            INSTANCES.remove(instance.getAddress());
        }

    }
}