com.facebook.buck.util.network.HttpPutLogger.java Source code

Introduction

Here is the source code for com.facebook.buck.util.network.HttpPutLogger.java

Source

/*
 * Copyright 2015-present Facebook, Inc.
 *
 * 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.facebook.buck.util.network;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.base.Function;
import com.google.common.collect.ImmutableCollection;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;

import java.io.IOException;
import java.io.StringWriter;

import javax.annotation.Nullable;

/**
 * Uploads log entries in batches as newline-separated JSON strings in a HTTP PUT request.
 */
public class HttpPutLogger extends BatchingLogger {

    private final HttpEndpoint endpoint;
    private final ObjectMapper objectMapper;

    public HttpPutLogger(HttpEndpoint endpoint, ObjectMapper objectMapper) {
        this.endpoint = endpoint;
        this.objectMapper = objectMapper;
    }

    @Override
    protected ListenableFuture<Void> logMultiple(ImmutableCollection<BatchEntry> data) {
        StringWriter stringWriter = new StringWriter();
        try {
            JsonGenerator jsonGenerator = objectMapper.getFactory().createGenerator(stringWriter);
            jsonGenerator.writeStartArray();
            for (BatchEntry entry : data) {
                jsonGenerator.writeRawValue(entry.getLine());
            }
            jsonGenerator.writeEndArray();
            jsonGenerator.close();
            return Futures.transform(endpoint.post(stringWriter.toString()), new Function<HttpResponse, Void>() {
                @Nullable
                @Override
                public Void apply(HttpResponse input) {
                    return null;
                }
            });
        } catch (IOException e) {
            return Futures.immediateFailedFuture(e);
        }
    }
}