Java tutorial
/* * Copyright 2018 NAVER Corp. * * 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 com.navercorp.pinpoint.web.cluster; import com.navercorp.pinpoint.io.request.Message; import com.navercorp.pinpoint.thrift.dto.command.TCommandTransferResponse; import com.navercorp.pinpoint.thrift.dto.command.TRouteResult; import com.navercorp.pinpoint.thrift.io.DeserializerFactory; import com.navercorp.pinpoint.thrift.io.HeaderTBaseDeserializer; import com.navercorp.pinpoint.thrift.util.SerializationUtils; import org.apache.commons.lang3.ArrayUtils; import org.apache.thrift.TBase; /** * @author Taejin Koo */ public class DefaultPinpointRouteResponse implements PinpointRouteResponse { private final byte[] payload; private TRouteResult routeResult; private TBase response; private String message; private boolean isParsed; public DefaultPinpointRouteResponse(byte[] payload) { this.payload = payload; } public void parse(DeserializerFactory<HeaderTBaseDeserializer> commandDeserializerFactory) { if (!isParsed) { if (ArrayUtils.isEmpty(payload)) { routeResult = TRouteResult.EMPTY_RESPONSE; return; } TBase<?, ?> object = deserialize(commandDeserializerFactory, payload, null); if (object == null) { routeResult = TRouteResult.NOT_SUPPORTED_RESPONSE; } else if (object instanceof TCommandTransferResponse) { TCommandTransferResponse commandResponse = (TCommandTransferResponse) object; TRouteResult routeResult = commandResponse.getRouteResult(); if (routeResult == null) { this.routeResult = TRouteResult.UNKNOWN; } else { this.routeResult = routeResult; } response = deserialize(commandDeserializerFactory, commandResponse.getPayload(), null); message = commandResponse.getMessage(); } else { routeResult = TRouteResult.UNKNOWN; response = object; } isParsed = true; } } @Override public TRouteResult getRouteResult() { assertParsed(); return routeResult; } @Override public TBase getResponse() { assertParsed(); return response; } @Override public String getMessage() { return message; } @Override public <R extends TBase> R getResponse(Class<R> clazz) { TBase response = getResponse(); if (clazz.isInstance(response)) { return (R) response; } throw new ClassCastException("Not expected " + clazz + " type."); } @Override public <R extends TBase> R getResponse(Class<R> clazz, R defaultValue) { TBase response = getResponse(); if (clazz.isInstance(response)) { return (R) response; } return defaultValue; } private void assertParsed() { if (!isParsed) { throw new IllegalStateException("not yet parsed."); } } private TBase<?, ?> deserialize(DeserializerFactory<HeaderTBaseDeserializer> commandDeserializerFactory, byte[] objectData, Message<TBase<?, ?>> defaultValue) { final Message<TBase<?, ?>> message = SerializationUtils.deserialize(objectData, commandDeserializerFactory, defaultValue); if (message == null) { return null; } return message.getData(); } }