Example usage for com.google.common.base Preconditions checkArgument

Introduction

In this page you can find the example usage for com.google.common.base Preconditions checkArgument.

Prototype

public static void checkArgument(boolean expression) 

Source Link

Document

Ensures the truth of an expression involving one or more parameters to the calling method.

Usage

From source file:org.apache.streams.twitter.provider.TwitterFollowingProvider.java

/**
 * To use from command line://from   w w  w. j  a v a 2s . c o m
 *
 * <p/>
 * Supply (at least) the following required configuration in application.conf:
 *
 * <p/>
 * twitter.oauth.consumerKey
 * twitter.oauth.consumerSecret
 * twitter.oauth.accessToken
 * twitter.oauth.accessTokenSecret
 * twitter.info
 *
 * <p/>
 * Launch using:
 *
 * <p/>
 * mvn exec:java -Dexec.mainClass=org.apache.streams.twitter.provider.TwitterFollowingProvider -Dexec.args="application.conf tweets.json"
 *
 * @param args args
 * @throws Exception Exception
 */
public static void main(String[] args) throws Exception {

    Preconditions.checkArgument(args.length >= 2);

    String configfile = args[0];
    String outfile = args[1];

    Config reference = ConfigFactory.load();
    File file = new File(configfile);
    assert (file.exists());
    Config testResourceConfig = ConfigFactory.parseFileAnySyntax(file,
            ConfigParseOptions.defaults().setAllowMissing(false));

    Config typesafe = testResourceConfig.withFallback(reference).resolve();

    StreamsConfiguration streamsConfiguration = StreamsConfigurator.detectConfiguration(typesafe);
    TwitterFollowingConfiguration config = new ComponentConfigurator<>(TwitterFollowingConfiguration.class)
            .detectConfiguration(typesafe, "twitter");
    TwitterFollowingProvider provider = new TwitterFollowingProvider(config);

    ObjectMapper mapper = new StreamsJacksonMapper(
            Collections.singletonList(TwitterDateTimeFormat.TWITTER_FORMAT));

    PrintStream outStream = new PrintStream(new BufferedOutputStream(new FileOutputStream(outfile)));
    provider.prepare(config);
    provider.startStream();
    do {
        Thread.sleep(streamsConfiguration.getBatchFrequencyMs());
        for (StreamsDatum datum : provider.readCurrent()) {
            String json;
            try {
                json = mapper.writeValueAsString(datum.getDocument());
                outStream.println(json);
            } catch (JsonProcessingException ex) {
                System.err.println(ex.getMessage());
            }
        }
    } while (provider.isRunning());
    provider.cleanUp();
    outStream.flush();
}

---

From source file:org.apache.streams.facebook.provider.page.FacebookPageProvider.java

/**
 * Run FacebookPageProvider from command line.
 * @param args configfile outfile//from  www  .  jav a  2 s . c  o m
 * @throws Exception Exception
 */
public static void main(String[] args) throws Exception {

    Preconditions.checkArgument(args.length >= 2);

    String configfile = args[0];
    String outfile = args[1];

    Config reference = ConfigFactory.load();
    File confFile = new File(configfile);
    assert (confFile.exists());
    Config conf = ConfigFactory.parseFileAnySyntax(confFile,
            ConfigParseOptions.defaults().setAllowMissing(false));

    Config typesafe = conf.withFallback(reference).resolve();

    StreamsConfiguration streamsConfiguration = StreamsConfigurator.detectConfiguration(typesafe);
    FacebookConfiguration config = new ComponentConfigurator<>(FacebookConfiguration.class)
            .detectConfiguration(typesafe, "facebook");
    FacebookPageProvider provider = new FacebookPageProvider(config);

    PrintStream outStream = new PrintStream(new BufferedOutputStream(new FileOutputStream(outfile)));
    provider.prepare(config);
    provider.startStream();
    do {
        Uninterruptibles.sleepUninterruptibly(streamsConfiguration.getBatchFrequencyMs(),
                TimeUnit.MILLISECONDS);
        for (StreamsDatum datum : provider.readCurrent()) {
            String json;
            try {
                json = MAPPER.writeValueAsString(datum.getDocument());
                outStream.println(json);
            } catch (JsonProcessingException ex) {
                System.err.println(ex.getMessage());
            }
        }
    } while (provider.isRunning());
    provider.cleanUp();
    outStream.flush();
}

---

From source file:com.cloudera.nav.sdk.examples.lineage3.LineageExport.java

/**
 * @param args 1. config file path/*  w  w w .ja v a  2  s . c  o  m*/
 *             2. query to fetch entities for which lineage
 *             would be downloaded.
 *             3. direction
 *             4. length
 *             5. lineage options
 * @throws Exception
 */
public static void main(String[] args) throws Exception {
    Preconditions.checkArgument(args.length == 5);
    Preconditions.checkArgument(
            "downstream".equals(args[2].toLowerCase()) || "upstream".equals(args[2].toLowerCase()));
    Preconditions.checkArgument(Integer.parseInt(args[3]) > 0);
    Preconditions.checkArgument(Integer.parseInt(args[4]) >= -1);

    (new LineageExport(args[0], args[1], args[2].toUpperCase(), args[3], args[4])).run();
}

---

From source file:nerds.antelax.commons.net.pubsub.Megaphone.java

public static void main(final String... args) throws Throwable {
    Preconditions.checkArgument(args.length > 1);
    final Collection<InetSocketAddress> servers = hostPortPairsFromString(args[0],
            PubSubServer.DEFAULT_ADDRESS.getPort());
    final Collection<String> topics = new LinkedList<String>();
    for (int pos = 1; pos < args.length; ++pos)
        topics.add(args[pos]);//  w ww .j  a va2  s .  c  o  m
    new Megaphone(servers, topics).repl();
}

---

From source file:org.apache.fluo.core.worker.FluoWorkerImpl.java

public static void main(String[] args) {
    if (args.length != 1) {
        System.err.println("Usage: FluoWorkerImpl <fluoPropsPath>");
        System.exit(-1);/* ww w. j  a  v  a2s .c  o m*/
    }
    String propsPath = args[0];
    Objects.requireNonNull(propsPath);
    File propsFile = new File(propsPath);
    if (!propsFile.exists()) {
        System.err.println("ERROR - Fluo properties file does not exist: " + propsPath);
        System.exit(-1);
    }
    Preconditions.checkArgument(propsFile.exists());
    try {
        FluoConfiguration config = new FluoConfiguration(propsFile);
        FluoWorkerImpl worker = new FluoWorkerImpl(config);
        worker.start();
        while (true) {
            UtilWaitThread.sleep(10000);
        }
    } catch (Exception e) {
        log.error("Exception running FluoWorker: ", e);
    }
}

---

From source file:org.apache.fluo.core.oracle.FluoOracleImpl.java

public static void main(String[] args) {
    if (args.length != 1) {
        System.err.println("Usage: FluoOracleImpl <fluoPropsPath>");
        System.exit(-1);//from  w w w . j  av  a2s.  c  om
    }
    String propsPath = args[0];
    Objects.requireNonNull(propsPath);
    File propsFile = new File(propsPath);
    if (!propsFile.exists()) {
        System.err.println("ERROR - Fluo properties file does not exist: " + propsPath);
        System.exit(-1);
    }
    Preconditions.checkArgument(propsFile.exists());
    try {
        FluoConfiguration config = new FluoConfiguration(propsFile);
        FluoOracleImpl oracle = new FluoOracleImpl(config);
        oracle.start();
        while (true) {
            UtilWaitThread.sleep(10000);
        }
    } catch (Exception e) {
        log.error("Exception running FluoOracle: ", e);
    }
}

---

From source file:org.apache.streams.twitter.provider.TwitterStreamProvider.java

/**
 * To use from command line://from  w ww.  j a  v a2  s . co  m
 *
 * <p/>
 * Supply (at least) the following required configuration in application.conf:
 *
 * <p/>
 * twitter.oauth.consumerKey
 * twitter.oauth.consumerSecret
 * twitter.oauth.accessToken
 * twitter.oauth.accessTokenSecret
 *
 * <p/>
 * Launch using:
 *
 * <p/>
 * mvn exec:java -Dexec.mainClass=org.apache.streams.twitter.provider.TwitterStreamProvider -Dexec.args="application.conf tweets.json"
 *
 * @param args
 */
public static void main(String[] args) {

    Preconditions.checkArgument(args.length >= 2);

    String configfile = args[0];
    String outfile = args[1];

    Config reference = ConfigFactory.load();
    File file = new File(configfile);
    assert (file.exists());
    Config testResourceConfig = ConfigFactory.parseFileAnySyntax(file,
            ConfigParseOptions.defaults().setAllowMissing(false));

    Config typesafe = testResourceConfig.withFallback(reference).resolve();

    StreamsConfiguration streamsConfiguration = StreamsConfigurator.detectConfiguration(typesafe);
    TwitterStreamConfiguration config = new ComponentConfigurator<>(TwitterStreamConfiguration.class)
            .detectConfiguration(typesafe, "twitter");
    TwitterStreamProvider provider = new TwitterStreamProvider(config);

    ObjectMapper mapper = StreamsJacksonMapper
            .getInstance(Collections.singletonList(TwitterDateTimeFormat.TWITTER_FORMAT));

    PrintStream outStream;
    try {
        outStream = new PrintStream(new BufferedOutputStream(new FileOutputStream(outfile)));
    } catch (FileNotFoundException ex) {
        LOGGER.error("FileNotFoundException", ex);
        return;
    }
    provider.prepare(config);
    provider.startStream();
    do {
        Uninterruptibles.sleepUninterruptibly(streamsConfiguration.getBatchFrequencyMs(),
                TimeUnit.MILLISECONDS);
        for (StreamsDatum datum : provider.readCurrent()) {
            String json;
            try {
                json = mapper.writeValueAsString(datum.getDocument());
                outStream.println(json);
            } catch (JsonProcessingException ex) {
                System.err.println(ex.getMessage());
            }
        }
    } while (provider.isRunning());
    provider.cleanUp();
    outStream.flush();
}

---

From source file:org.apache.streams.twitter.provider.TwitterUserInformationProvider.java

/**
 * To use from command line:/*w w  w .  ja v  a2 s. com*/
 *
 * <p/>
 * Supply (at least) the following required configuration in application.conf:
 *
 * <p/>
 * twitter.oauth.consumerKey
 * twitter.oauth.consumerSecret
 * twitter.oauth.accessToken
 * twitter.oauth.accessTokenSecret
 * twitter.info
 *
 * <p/>
 * Launch using:
 *
 * <p/>
 * mvn exec:java -Dexec.mainClass=org.apache.streams.twitter.provider.TwitterUserInformationProvider -Dexec.args="application.conf tweets.json"
 *
 * @param args args
 * @throws Exception Exception
 */
public static void main(String[] args) throws Exception {

    Preconditions.checkArgument(args.length >= 2);

    String configfile = args[0];
    String outfile = args[1];

    Config reference = ConfigFactory.load();
    File file = new File(configfile);
    assert (file.exists());
    Config testResourceConfig = ConfigFactory.parseFileAnySyntax(file,
            ConfigParseOptions.defaults().setAllowMissing(false));

    Config typesafe = testResourceConfig.withFallback(reference).resolve();

    StreamsConfiguration streamsConfiguration = StreamsConfigurator.detectConfiguration(typesafe);
    TwitterUserInformationConfiguration config = new ComponentConfigurator<>(
            TwitterUserInformationConfiguration.class).detectConfiguration(typesafe, "twitter");
    TwitterUserInformationProvider provider = new TwitterUserInformationProvider(config);

    PrintStream outStream = new PrintStream(new BufferedOutputStream(new FileOutputStream(outfile)));
    provider.prepare(config);
    provider.startStream();
    do {
        Uninterruptibles.sleepUninterruptibly(streamsConfiguration.getBatchFrequencyMs(),
                TimeUnit.MILLISECONDS);
        for (StreamsDatum datum : provider.readCurrent()) {
            String json;
            try {
                json = MAPPER.writeValueAsString(datum.getDocument());
                outStream.println(json);
            } catch (JsonProcessingException ex) {
                System.err.println(ex.getMessage());
            }
        }
    } while (provider.isRunning());
    provider.cleanUp();
    outStream.flush();
}

---

From source file:org.apache.streams.moreover.MoreoverProvider.java

/**
 * To use from command line:// w w  w  .  jav a 2  s. c  o  m
 *
 * <p/>
 * Supply configuration similar to src/test/resources/rss.conf
 *
 * <p/>
 * Launch using:
 *
 * <p/>
 * mvn exec:java -Dexec.mainClass=org.apache.streams.moreover.MoreoverProvider -Dexec.args="rss.conf articles.json"
 *
 * @param args args
 * @throws Exception Exception
 */
public static void main(String[] args) throws Exception {

    Preconditions.checkArgument(args.length >= 2);

    String configfile = args[0];
    String outfile = args[1];

    Config reference = ConfigFactory.load();
    File file = new File(configfile);
    assert (file.exists());
    Config testResourceConfig = ConfigFactory.parseFileAnySyntax(file,
            ConfigParseOptions.defaults().setAllowMissing(false));

    Config typesafe = testResourceConfig.withFallback(reference).resolve();

    StreamsConfiguration streamsConfiguration = StreamsConfigurator.detectConfiguration(typesafe);
    MoreoverConfiguration config = new ComponentConfigurator<>(MoreoverConfiguration.class)
            .detectConfiguration(typesafe, "rss");
    MoreoverProvider provider = new MoreoverProvider(config);

    ObjectMapper mapper = StreamsJacksonMapper.getInstance();

    PrintStream outStream = new PrintStream(new BufferedOutputStream(new FileOutputStream(outfile)));
    provider.prepare(config);
    provider.startStream();
    do {
        Uninterruptibles.sleepUninterruptibly(streamsConfiguration.getBatchFrequencyMs(),
                TimeUnit.MILLISECONDS);
        for (StreamsDatum datum : provider.readCurrent()) {
            String json;
            try {
                json = mapper.writeValueAsString(datum.getDocument());
                outStream.println(json);
            } catch (JsonProcessingException ex) {
                System.err.println(ex.getMessage());
            }
        }
    } while (provider.isRunning());
    provider.cleanUp();
    outStream.flush();
}

---

From source file:org.apache.streams.twitter.provider.TwitterTimelineProvider.java

/**
 * To use from command line:// w w w . j a v  a2 s . c  o m
 *
 * <p/>
 * Supply (at least) the following required configuration in application.conf:
 *
 * <p/>
 * twitter.oauth.consumerKey
 * twitter.oauth.consumerSecret
 * twitter.oauth.accessToken
 * twitter.oauth.accessTokenSecret
 * twitter.info
 *
 * <p/>
 * Launch using:
 *
 * <p/>
 * mvn exec:java -Dexec.mainClass=org.apache.streams.twitter.provider.TwitterTimelineProvider -Dexec.args="application.conf tweets.json"
 *
 * @param args args
 * @throws Exception Exception
 */
public static void main(String[] args) throws Exception {

    Preconditions.checkArgument(args.length >= 2);

    String configfile = args[0];
    String outfile = args[1];

    Config reference = ConfigFactory.load();
    File file = new File(configfile);
    assert (file.exists());
    Config testResourceConfig = ConfigFactory.parseFileAnySyntax(file,
            ConfigParseOptions.defaults().setAllowMissing(false));

    Config typesafe = testResourceConfig.withFallback(reference).resolve();

    StreamsConfiguration streamsConfiguration = StreamsConfigurator.detectConfiguration(typesafe);
    TwitterTimelineProviderConfiguration config = new ComponentConfigurator<>(
            TwitterTimelineProviderConfiguration.class).detectConfiguration(typesafe, "twitter");
    TwitterTimelineProvider provider = new TwitterTimelineProvider(config);

    ObjectMapper mapper = new StreamsJacksonMapper(
            Stream.of(TwitterDateTimeFormat.TWITTER_FORMAT).collect(Collectors.toList()));

    PrintStream outStream = new PrintStream(new BufferedOutputStream(new FileOutputStream(outfile)));
    provider.prepare(config);
    provider.startStream();
    do {
        Uninterruptibles.sleepUninterruptibly(streamsConfiguration.getBatchFrequencyMs(),
                TimeUnit.MILLISECONDS);
        for (StreamsDatum datum : provider.readCurrent()) {
            String json;
            try {
                json = mapper.writeValueAsString(datum.getDocument());
                outStream.println(json);
            } catch (JsonProcessingException ex) {
                System.err.println(ex.getMessage());
            }
        }
    } while (provider.isRunning());
    provider.cleanUp();
    outStream.flush();
}

---

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