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// Copyright 2014 Google Inc. All rights reserved.
//
// 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.google.devtools.build.lib.webstatusserver;
import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.analysis.BlazeDirectories;
import com.google.devtools.build.lib.analysis.BlazeVersionInfo;
import com.google.devtools.build.lib.runtime.BlazeModule;
import com.google.devtools.build.lib.runtime.BlazeServerStartupOptions;
import com.google.devtools.build.lib.runtime.Command;
import com.google.devtools.build.lib.runtime.CommandEnvironment;
import com.google.devtools.build.lib.util.AbruptExitException;
import com.google.devtools.build.lib.util.Clock;
import com.google.devtools.common.options.OptionsBase;
import com.google.devtools.common.options.OptionsProvider;
import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;
import java.io.IOException;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.nio.charset.StandardCharsets;
import java.util.LinkedList;
import java.util.UUID;
import java.util.logging.Logger;
/**
* Web server for monitoring blaze commands status.
*/
public class WebStatusServerModule extends BlazeModule {
static final String LAST_TEST_URI = "/tests/last";
// 100 is an arbitrary limit; it seems like a reasonable size for history and it's okay to change
// it
private static final int MAX_TESTS_STORED = 100;
private HttpServer server;
private boolean running = false;
private BlazeServerStartupOptions serverOptions;
private static final Logger LOG =
Logger.getLogger(WebStatusServerModule.class.getCanonicalName());
private int port;
private LinkedList<TestStatusHandler> testsRan = new LinkedList<>();
@SuppressWarnings("unused")
private WebStatusEventCollector collector;
@SuppressWarnings("unused")
private IndexPageHandler indexHandler;
@Override
public Iterable<Class<? extends OptionsBase>> getStartupOptions() {
return ImmutableList.<Class<? extends OptionsBase>>of(BlazeServerStartupOptions.class);
}
@Override
public void blazeStartup(OptionsProvider startupOptions, BlazeVersionInfo versionInfo,
UUID instanceId, BlazeDirectories directories, Clock clock) throws AbruptExitException {
serverOptions = startupOptions.getOptions(BlazeServerStartupOptions.class);
if (serverOptions.useWebStatusServer <= 0) {
LOG.info("web status server disabled");
return;
}
port = serverOptions.useWebStatusServer;
try {
server = HttpServer.create(new InetSocketAddress(port), 0);
serveStaticContent();
TextHandler lastCommandHandler = new TextHandler("No commands ran yet.");
server.createContext("/last", lastCommandHandler);
server.setExecutor(null);
server.start();
indexHandler = new IndexPageHandler(server, this.testsRan);
running = true;
LOG.info("Running web status server on port " + port);
} catch (IOException e) {
// TODO(bazel-team): Display information about why it failed
running = false;
LOG.warning("Unable to run web status server on port " + port);
}
}
@Override
public void beforeCommand(Command command, CommandEnvironment env)
throws AbruptExitException {
if (!running) {
return;
}
collector =
new WebStatusEventCollector(env.getEventBus(), env.getReporter(), this);
}
public void commandStarted() {
WebStatusBuildLog currentBuild = collector.getBuildLog();
if (testsRan.size() == MAX_TESTS_STORED) {
TestStatusHandler oldestTest = testsRan.removeLast();
oldestTest.deregister();
}
TestStatusHandler lastTest = new TestStatusHandler(server, currentBuild);
testsRan.add(lastTest);
lastTest.overrideURI(LAST_TEST_URI);
}
private void serveStaticContent() {
StaticResourceHandler testjs =
StaticResourceHandler.createFromRelativePath("static/test.js", "application/javascript");
StaticResourceHandler indexjs =
StaticResourceHandler.createFromRelativePath("static/index.js", "application/javascript");
StaticResourceHandler style =
StaticResourceHandler.createFromRelativePath("static/style.css", "text/css");
StaticResourceHandler d3 = StaticResourceHandler.createFromAbsolutePath(
"third_party/javascript/d3/d3-js.js", "application/javascript");
StaticResourceHandler jquery = StaticResourceHandler.createFromAbsolutePath(
"third_party/javascript/jquery/v2_0_3/jquery_uncompressed.jslib",
"application/javascript");
StaticResourceHandler testFrontend =
StaticResourceHandler.createFromRelativePath("static/test.html", "text/html");
server.createContext("/css/style.css", style);
server.createContext("/js/test.js", testjs);
server.createContext("/js/index.js", indexjs);
server.createContext("/js/lib/d3.js", d3);
server.createContext("/js/lib/jquery.js", jquery);
server.createContext(LAST_TEST_URI, testFrontend);
}
private static class TextHandler implements HttpHandler {
private String response;
private TextHandler(String response) {
this.response = response;
}
@Override
public void handle(HttpExchange exchange) throws IOException {
exchange.getResponseHeaders().put("Content-Type", ImmutableList.of("text/plain"));
exchange.sendResponseHeaders(200, response.length());
try (OutputStream os = exchange.getResponseBody()) {
os.write(response.getBytes(StandardCharsets.UTF_8));
}
}
}
public int getPort() {
return port;
}
}
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