io.servicecomb.transport.highway.HighwayCodec Maven / Gradle / Ivy

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/*
 * Copyright 2017 Huawei Technologies Co., Ltd
 *
 * 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 io.servicecomb.transport.highway;

import io.servicecomb.codec.protobuf.definition.OperationProtobuf;
import io.servicecomb.codec.protobuf.utils.WrapSchema;
import io.servicecomb.core.Invocation;
import io.servicecomb.core.invocation.InvocationFactory;

import io.protostuff.runtime.ProtobufFeature;
import io.servicecomb.foundation.vertx.client.tcp.TcpData;
import io.servicecomb.foundation.vertx.tcp.TcpOutputStream;
import io.servicecomb.swagger.invocation.Response;
import io.servicecomb.transport.highway.message.RequestHeader;
import io.servicecomb.transport.highway.message.ResponseHeader;
import io.vertx.core.buffer.Buffer;

public final class HighwayCodec {
    private static HighwayTransport highwayTransport;

    private HighwayCodec() {
    }

    public static void setHighwayTransport(HighwayTransport highwayTransport) {
        HighwayCodec.highwayTransport = highwayTransport;
    }

    public static TcpOutputStream encodeRequest(long msgId, Invocation invocation,
            OperationProtobuf operationProtobuf, ProtobufFeature protobufFeature) throws Exception {
        // 写header
        RequestHeader header = new RequestHeader();
        header.setMsgType(MsgType.REQUEST);
        header.setFlags(0);
        header.setDestMicroservice(invocation.getMicroserviceName());
        header.setSchemaId(invocation.getSchemaId());
        header.setOperationName(invocation.getOperationName());
        header.setContext(invocation.getContext());

        HighwayOutputStream os = new HighwayOutputStream(msgId, protobufFeature);
        os.write(header, operationProtobuf.getRequestSchema(), invocation.getArgs());
        return os;
    }

    public static Invocation decodeRequest(RequestHeader header, OperationProtobuf operationProtobuf,
            Buffer bodyBuffer, ProtobufFeature protobufFeature) throws Exception {
        WrapSchema schema = operationProtobuf.getRequestSchema();
        Object[] args = schema.readObject(bodyBuffer, protobufFeature);

        Invocation invocation =
            InvocationFactory.forProvider(highwayTransport.getEndpoint(),
                    operationProtobuf.getOperationMeta(),
                    args);
        invocation.setContext(header.getContext());
        return invocation;

    }

    public static RequestHeader readRequestHeader(Buffer headerBuffer,
            ProtobufFeature protobufFeature) throws Exception {
        return RequestHeader.readObject(headerBuffer, protobufFeature);
    }

    public static Buffer encodeResponse(long msgId, ResponseHeader header, WrapSchema bodySchema,
            Object body, ProtobufFeature protobufFeature) throws Exception {
        try (HighwayOutputStream os = new HighwayOutputStream(msgId, protobufFeature)) {
            os.write(header, bodySchema, body);
            return os.getBuffer();
        }
    }

    public static Response decodeResponse(Invocation invocation, OperationProtobuf operationProtobuf,
            TcpData tcpData, ProtobufFeature protobufFeature) throws Exception {
        ResponseHeader header = ResponseHeader.readObject(tcpData.getHeaderBuffer(), protobufFeature);
        if (header.getContext() != null) {
            invocation.getContext().putAll(header.getContext());
        }

        WrapSchema bodySchema = operationProtobuf.findResponseSchema(header.getStatusCode());
        Object body = bodySchema.readObject(tcpData.getBodyBuffer(), protobufFeature);

        Response response = Response.create(header.getStatusCode(), header.getReasonPhrase(), body);
        response.setHeaders(header.getHeaders());

        return response;
    }
}