org.wildfly.httpclient.ejb.HttpDiscoveryHandler Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of wildfly-client-all

This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

There is a newer version: 34.0.0.Final

Show newest version

/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2020 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * 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.wildfly.httpclient.ejb;

import io.undertow.server.HttpServerExchange;
import io.undertow.util.Headers;
import org.jboss.ejb.client.EJBModuleIdentifier;
import org.jboss.ejb.server.Association;
import org.jboss.ejb.server.ModuleAvailabilityListener;
import org.jboss.marshalling.Marshaller;
import org.jboss.marshalling.Marshalling;
import org.wildfly.httpclient.common.HttpServiceConfig;
import org.wildfly.httpclient.common.NoFlushByteOutput;

import java.io.ByteArrayOutputStream;
import java.nio.ByteBuffer;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.ExecutorService;

/**
 * Http handler for discovery requests.
 *
 * @author Tomasz Adamski
 */

public class HttpDiscoveryHandler extends RemoteHTTPHandler {

    private final Set availableModules = new HashSet<>();
    private final HttpServiceConfig httpServiceConfig;

    @Deprecated
    public HttpDiscoveryHandler(ExecutorService executorService, Association association) {
        this (executorService, association, HttpServiceConfig.DEFAULT);
    }

    public HttpDiscoveryHandler(ExecutorService executorService, Association association, HttpServiceConfig httpServiceConfig) {
        super(executorService);
        association.registerModuleAvailabilityListener(new ModuleAvailabilityListener() {
            @Override
            public void moduleAvailable(List modules) {
                availableModules.addAll(modules);
            }

            @Override
            public void moduleUnavailable(List modules) {
                availableModules.removeAll(modules);
            }
        });
        this.httpServiceConfig = httpServiceConfig;
    }

    @Override
    protected void handleInternal(HttpServerExchange exchange) throws Exception {
        exchange.getResponseHeaders().put(Headers.CONTENT_TYPE, EjbConstants.EJB_DISCOVERY_RESPONSE.toString());
        final ByteArrayOutputStream out = new ByteArrayOutputStream();
        Marshaller marshaller = httpServiceConfig.getHttpMarshallerFactory(exchange)
                .createMarshaller(HttpProtocolV1ObjectTable.INSTANCE);
        marshaller.start(new NoFlushByteOutput(Marshalling.createByteOutput(out)));
        marshaller.writeInt(availableModules.size());
        for (EJBModuleIdentifier ejbModuleIdentifier : availableModules) {
            marshaller.writeObject(ejbModuleIdentifier);
        }
        marshaller.finish();
        marshaller.flush();
        exchange.getResponseSender().send(ByteBuffer.wrap(out.toByteArray()));
    }
}