org.dartlang.vm.service.internal.ErrorRequestSink.java Source code

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Here is the source code for org.dartlang.vm.service.internal.ErrorRequestSink.java

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/*
 * Copyright (c) 2015, the Dart project authors.
 * 
 * Licensed under the Eclipse Public License v1.0 (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.eclipse.org/legal/epl-v10.html
 * 
 * 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.dartlang.vm.service.internal;

import com.google.gson.JsonObject;

import org.dartlang.vm.service.logging.Logging;

/**
 * A {@link RequestSink} that reports with an error to each request.
 */
public class ErrorRequestSink implements RequestSink, VmServiceConst {
    /**
     * The {@link ResponseSink} to send error responses to.
     */
    private final ResponseSink responseSink;

    private final String code;
    private final String message;

    public ErrorRequestSink(ResponseSink responseSink, String code, String message) {
        if (responseSink == null || code == null || message == null) {
            throw new IllegalArgumentException(
                    "Unexpected null argument: " + responseSink + " " + code + " " + message);
        }
        this.responseSink = responseSink;
        this.code = code;
        this.message = message;
    }

    @Override
    public void add(JsonObject request) {
        String id = request.getAsJsonPrimitive(ID).getAsString();
        try {
            // TODO(danrubel) is this the correct format for an error response?
            JsonObject error = new JsonObject();
            error.addProperty(CODE, code);
            error.addProperty(MESSAGE, message);
            JsonObject response = new JsonObject();
            response.addProperty(ID, id);
            response.add(ERROR, error);
            responseSink.add(response);
        } catch (Throwable e) {
            Logging.getLogger().logError(e.getMessage(), e);
        }
    }

    @Override
    public void close() {
    }
}