org.rzo.netty.ahessian.rpc.message.HessianRPCCallDecoder.java Source code

Introduction

Here is the source code for org.rzo.netty.ahessian.rpc.message.HessianRPCCallDecoder.java

Source

/*******************************************************************************
 * Copyright  2015 rzorzorzo@users.sf.net
 *
 * 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.rzo.netty.ahessian.rpc.message;

import io.netty.channel.ChannelHandlerContext;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.rzo.netty.ahessian.Constants;
import org.rzo.netty.ahessian.io.InputStreamConsumer;
import org.rzo.netty.ahessian.io.InputStreamHandler;
import org.rzo.netty.ahessian.io.OutputStreamHandler;
import org.rzo.netty.ahessian.rpc.io.Hessian2Input;
import org.rzo.netty.ahessian.rpc.server.HessianRPCServiceHandler;
import org.rzo.netty.ahessian.session.ServerSessionFilter;

import com.caucho.hessian4.io.AbstractSerializerFactory;
import com.caucho.hessian4.io.SerializerFactory;

/**
 * Decodes a call request from an input stream
 */
public class HessianRPCCallDecoder implements InputStreamConsumer, Constants {

    /** The _factory. */
    HessianRPCServiceHandler _factory;
    SerializerFactory sFactory = new SerializerFactory();
    volatile Hessian2Input in = null;

    public HessianRPCCallDecoder() {
        super();
    }

    public HessianRPCCallDecoder(AbstractSerializerFactory serializerFactory) {
        super();
        if (serializerFactory != null)
            sFactory.addFactory(serializerFactory);
    }

    public void consume(ChannelHandlerContext ctx, InputStream inx) {
        HessianRPCCallMessage result = null;
        boolean getNextMessage = true;
        if (in == null || in.isClosed() || in.getInputStream() != inx) {
            in = new Hessian2Input(inx);
            in.setSerializerFactory(sFactory);
        }
        while (ctx.channel().isActive() && getNextMessage) {
            try {

                if (in.bufferEmpty()) {
                    // we have nothing to parse
                    break;
                }

                int ch;
                if ((ch = in.read()) != 'H') {
                    if (ch == 0)
                        ahessianLogger.info("H expected got Ping");
                    else
                        ahessianLogger.warn("H expected got " + "0x" + Integer.toHexString(ch & 0xff) + " ("
                                + (char) +ch + ")");
                    continue;
                }
                in.read();
                in.read();
                in.readEnvelope();
                String h = in.readString();
                if (!HEADER_STRING.equals(h)) {
                    ahessianLogger.warn("missing header");
                    continue;
                }

                Map<Object, Object> headers = new HashMap<Object, Object>();
                String methodName = null;
                List values = new ArrayList();

                int l = in.readInt();
                for (int i = 0; i < l; i++) {
                    Integer key = in.readInt();
                    Object value = in.readObject();
                    headers.put(key, value);
                }
                in.readCall();
                methodName = in.readMethod();
                int argsLength = in.readInt();

                for (int i = 0; i < argsLength; i++)
                    values.add(in.readObject());

                in.completeCall();
                in.completeEnvelope();

                in.resetReferences();
                result = new HessianRPCCallMessage(methodName, values.toArray(), headers,
                        (OutputStreamHandler) OutputStreamHandler.getOutputEncoder(ctx));
                result.setServer(true);
                result.setHasSessionFilter((Boolean) headers.get(HAS_SESSION_FILTER_HEADER_KEY));
                result.setSession(ServerSessionFilter.getSession(ctx));
                result.setHandler(InputStreamHandler.getHandler(ctx));
            } catch (Exception ex) {
                Constants.ahessianLogger.warn("", ex);
                result = null;
            }
            if (in.bufferEmpty()) {
                getNextMessage = false;
            }
            if (result != null) {
                // System.out.println("got call "+result);
                ctx.fireChannelRead(result);
            }
        }
    }

    public boolean isBufferEmpty() {
        return in != null && in.bufferEmpty();
    }

    public void setContext(ChannelHandlerContext ctx) {
        if (in == null) {
            in = new Hessian2Input(InputStreamHandler.getInputStream(ctx));
            in.setSerializerFactory(sFactory);
        }
    }

}