89 lines
3.1 KiB
Java
89 lines
3.1 KiB
Java
/*
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* Copyright (c) 2011 Tony Garnock-Jones. All rights reserved.
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*/
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package hop;
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import java.io.Flushable;
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import java.io.IOException;
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import java.util.UUID;
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/**
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*/
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public class ServerApi implements Flushable {
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public NodeContainer _container;
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public String _serverName;
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public String _kName;
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public HalfQueue _k;
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public ServerApi(NodeContainer container, String serverName) {
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_container = container;
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_serverName = serverName;
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_kName = UUID.randomUUID().toString();
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_k = new HalfQueue();
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_container.bind(_kName, _k);
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}
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public SexpList _nextReply() throws InterruptedException, SexpSyntaxError {
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Object x = _k.getQueue().take();
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if (x instanceof SexpList) return (SexpList) x;
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throw new SexpSyntaxError("Unexpected non-list");
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}
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public void post(String sink, Object name, Object message, Object token) {
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_container.post(_serverName, sink, SexpMessage.post(name, message, token), null);
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}
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public void send(String sink, Object message) {
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_container.post(_serverName, sink, message, null);
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}
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public void flush() throws IOException {
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_container.flush(_serverName);
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}
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public synchronized Object subscribe(String source, Object filter, String sink, String name) throws InterruptedException, IOException {
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send(source, SexpMessage.subscribe(filter, sink, name, _container.getName(), _kName));
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flush();
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SexpList reply = _nextReply();
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assert reply.getBytes(0).getDataString().equals(SexpMessage._subscribe_ok);
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return reply.get(1);
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}
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public synchronized Object subscribe(String source, Object filter, String name) throws InterruptedException, IOException {
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return subscribe(source, filter, _container.getName(), name);
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}
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public Subscription subscribe(String source, Object filter) throws InterruptedException, IOException {
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return new Subscription(this, source, filter);
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}
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public void unsubscribe(String source, Object token) throws IOException {
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send(source, SexpMessage.unsubscribe(token));
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flush();
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/* TODO: optional synchronous reply? */
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}
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public synchronized Object create(String nodeClassName, Object arg) throws InterruptedException, IOException {
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send("factory", SexpMessage.create(nodeClassName, arg, _container.getName(), _kName));
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flush();
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SexpList reply = _nextReply();
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SexpBytes selector = reply.getBytes(0);
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if (selector.equals(SexpMessage._create_ok)) return null;
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assert selector.equals(SexpMessage._create_failed);
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return reply.get(1);
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}
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public Object createQueue(String name) throws InterruptedException, IOException {
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return create("queue", SexpList.with(name));
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}
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public Object createFanout(String name) throws InterruptedException, IOException {
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return create("fanout", SexpList.with(name));
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}
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public Object createDirect(String name) throws InterruptedException, IOException {
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return create("direct", SexpList.with(name));
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}
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}
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