Example usage for com.google.common.io Closer create

Introduction

In this page you can find the example usage for com.google.common.io Closer create.

Prototype

public static Closer create() 

Source Link

Document

Creates a new Closer .

Usage

From source file:gobblin.yarn.Log4jConfigurationHelper.java

/**
 * Update the log4j configuration./*  w w  w.j a  v  a 2 s.  c o m*/
 *
 * @param targetClass the target class used to get the original log4j configuration file as a resource
 * @param log4jPath the custom log4j configuration properties file path
 * @throws IOException if there's something wrong with updating the log4j configuration
 */
public static void updateLog4jConfiguration(Class<?> targetClass, String log4jPath) throws IOException {
    Closer closer = Closer.create();
    try {
        InputStream fileInputStream = closer.register(new FileInputStream(log4jPath));
        InputStream inputStream = closer
                .register(targetClass.getResourceAsStream("/" + LOG4J_CONFIGURATION_FILE_NAME));
        Properties customProperties = new Properties();
        customProperties.load(fileInputStream);
        Properties originalProperties = new Properties();
        originalProperties.load(inputStream);

        for (Entry<Object, Object> entry : customProperties.entrySet()) {
            originalProperties.setProperty(entry.getKey().toString(), entry.getValue().toString());
        }

        LogManager.resetConfiguration();
        PropertyConfigurator.configure(originalProperties);
    } catch (Throwable t) {
        throw closer.rethrow(t);
    } finally {
        closer.close();
    }
}

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From source file:gobblin.metrics.MetricReportUtils.java

/**
 * Parses a {@link gobblin.metrics.MetricReport} from a byte array representing a json input.
 * @param reuse MetricReport to reuse.//from   w ww. ja va 2s.c o m
 * @param bytes Input bytes.
 * @return MetricReport.
 * @throws java.io.IOException
 */
public synchronized static MetricReport deserializeReportFromJson(MetricReport reuse, byte[] bytes)
        throws IOException {
    if (!READER.isPresent()) {
        READER = Optional.of(new SpecificDatumReader<MetricReport>(MetricReport.class));
    }

    Closer closer = Closer.create();

    try {
        DataInputStream inputStream = closer.register(new DataInputStream(new ByteArrayInputStream(bytes)));

        // Check version byte
        int versionNumber = inputStream.readInt();
        if (versionNumber != SCHEMA_VERSION) {
            throw new IOException(
                    String.format("MetricReport schema version not recognized. Found version %d, expected %d.",
                            versionNumber, SCHEMA_VERSION));
        }

        // Decode the rest
        Decoder decoder = DecoderFactory.get().jsonDecoder(MetricReport.SCHEMA$, inputStream);
        return READER.get().read(reuse, decoder);
    } catch (Throwable t) {
        throw closer.rethrow(t);
    } finally {
        closer.close();
    }
}

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From source file:org.glowroot.common.Manifests.java

public static @Nullable Manifest getManifest(Class<?> clazz) throws IOException {
    URL classURL = clazz.getResource(clazz.getSimpleName() + ".class");
    if (classURL == null) {
        logger.warn("url for class is unexpectedly null: {}", clazz);
        return null;
    }//from  www. j  av a 2  s .c o m
    String externalForm = classURL.toExternalForm();
    if (!externalForm.startsWith("jar:")) {
        return null;
    }
    URL manifestURL = new URL(
            externalForm.substring(0, externalForm.lastIndexOf('!')) + "!/META-INF/MANIFEST.MF");
    // Closer is used to simulate Java 7 try-with-resources
    Closer closer = Closer.create();
    InputStream manifestIn = closer.register(manifestURL.openStream());
    try {
        return new Manifest(manifestIn);
    } catch (Throwable t) {
        throw closer.rethrow(t);
    } finally {
        closer.close();
    }
}

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From source file:org.apache.gobblin.aws.Log4jConfigHelper.java

/**
 * Update the log4j configuration.// w  w w . j av  a  2s. co m
 *
 * @param targetClass the target class used to get the original log4j configuration file as a resource
 * @param log4jFileName the custom log4j configuration properties file name
 * @throws IOException if there's something wrong with updating the log4j configuration
 */
public static void updateLog4jConfiguration(Class<?> targetClass, String log4jFileName) throws IOException {
    final Closer closer = Closer.create();
    try {
        final InputStream inputStream = closer.register(targetClass.getResourceAsStream("/" + log4jFileName));
        final Properties originalProperties = new Properties();
        originalProperties.load(inputStream);

        LogManager.resetConfiguration();
        PropertyConfigurator.configure(originalProperties);
    } catch (Throwable t) {
        throw closer.rethrow(t);
    } finally {
        closer.close();
    }
}

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From source file:org.glowroot.agent.weaving.ClassLoaders.java

static void defineClassesInBootstrapClassLoader(Collection<LazyDefinedClass> lazyDefinedClasses,
        Instrumentation instrumentation, File generatedJarFile) throws IOException {
    Closer closer = Closer.create();
    try {/*from ww  w . ja  v a 2s.co m*/
        FileOutputStream out = closer.register(new FileOutputStream(generatedJarFile));
        JarOutputStream jarOut = closer.register(new JarOutputStream(out));
        generate(lazyDefinedClasses, jarOut);
    } catch (Throwable t) {
        throw closer.rethrow(t);
    } finally {
        closer.close();
    }
    instrumentation.appendToBootstrapClassLoaderSearch(new JarFile(generatedJarFile));
    // appendToBootstrapClassLoaderSearch() line above does not add to the bootstrap resource
    // search path, only to the bootstrap class search path (this is different from
    // appendToSystemClassLoaderSearch() which adds to both the system resource search path and
    // the system class search path)
    //
    // adding the generated jar file to the bootstrap resource search path is probably needed
    // more generally, but it is at least needed to support jboss 4.2.0 - 4.2.3 because
    // org.jboss.mx.loading.LoadMgr3.beginLoadTask() checks that the class loader has the class
    // as a resource before loading it, so without adding the generated jar file to the
    // bootstrap resource search path, jboss ends up throwing ClassNotFoundException for the
    // glowroot generated classes that have been added to the bootstrap class loader search path
    // (see issue #101 for more info on this particular jboss issue)
    appendToBootstrapResourcePath(generatedJarFile);
}

---

From source file:org.stem.db.FatFileAllocator.java

public static void allocateFile(String filePath, long sizeInMB, boolean mark) throws IOException {
    long started = System.currentTimeMillis();

    Closer closer = Closer.create();
    try {// w w w .j  a  v  a  2s  .c  om
        File file = new File(filePath);
        if (file.exists())
            throw new IOException(String.format("File already exists: %s", filePath));

        RandomAccessFile rw = closer.register(new RandomAccessFile(file, "rw"));
        rw.setLength(sizeInMB * 1024 * 1024);
        if (mark) {
            rw.seek(0);
            rw.writeByte(FatFile.MARKER_BLANK);
            rw.seek(rw.length() - 1);
            rw.writeByte(FatFile.MARKER_BLANK);
        }
    } catch (Throwable e) {
        throw closer.rethrow(e);
    } finally {
        closer.close();
        logger.debug("{} was allocated in {} ms", filePath, System.currentTimeMillis() - started);
    }
}

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From source file:org.apache.gobblin.util.logs.Log4jConfigurationHelper.java

/**
 * Update the log4j configuration.// ww w  . jav  a2  s  . co  m
 *
 * @param targetClass the target class used to get the original log4j configuration file as a resource
 * @param log4jPath the custom log4j configuration properties file path
 * @param log4jFileName the custom log4j configuration properties file name
 * @throws IOException if there's something wrong with updating the log4j configuration
 */
public static void updateLog4jConfiguration(Class<?> targetClass, String log4jPath, String log4jFileName)
        throws IOException {
    Closer closer = Closer.create();
    try {
        InputStream fileInputStream = closer.register(new FileInputStream(log4jPath));
        InputStream inputStream = closer.register(targetClass.getResourceAsStream("/" + log4jFileName));
        Properties customProperties = new Properties();
        customProperties.load(fileInputStream);
        Properties originalProperties = new Properties();
        originalProperties.load(inputStream);

        for (Entry<Object, Object> entry : customProperties.entrySet()) {
            originalProperties.setProperty(entry.getKey().toString(), entry.getValue().toString());
        }

        LogManager.resetConfiguration();
        PropertyConfigurator.configure(originalProperties);
    } catch (Throwable t) {
        throw closer.rethrow(t);
    } finally {
        closer.close();
    }
}

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From source file:org.jmattr.meta.impl.ServicesFiles.java

/**
 * Reads the set of service classes from a service file.
 *
 * @param input not {@code null}. Closed after use.
 * @return a not {@code null Set} of service class names.
 * @throws IOException//from  ww w .j  av a 2s  .  co m
 */
static Set<String> readServiceFile(InputStream input) throws IOException {
    HashSet<String> serviceClasses = new HashSet<String>();
    Closer closer = Closer.create();
    try {
        // TODO(gak): use CharStreams
        BufferedReader r = closer.register(new BufferedReader(new InputStreamReader(input, Charsets.UTF_8)));
        String line;
        while ((line = r.readLine()) != null) {
            int commentStart = line.indexOf('#');
            if (commentStart >= 0) {
                line = line.substring(0, commentStart);
            }
            line = line.trim();
            if (!line.isEmpty()) {
                serviceClasses.add(line);
            }
        }
        return serviceClasses;
    } catch (Throwable t) {
        throw closer.rethrow(t);
    } finally {
        closer.close();
    }
}

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From source file:org.asoem.greyfish.utils.persistence.Persisters.java

/**
 * Create a copy of the given object {@code o} by serializing it with the given {@code Persister}. What copy means
 * in this context, dependents fully on the {@code Persister} implementation.
 *
 * @param o         the object you wish to copy
 * @param persister the {@code Persister} to use for the serialization process
 * @return a copy of {@code o}//  www.ja  v  a 2  s .  c o  m
 * @throws Exception if some errors occur during the serialization process
 */
public static <T> T copyAsync(final T o, final Persister persister) throws Exception {
    checkNotNull(o);
    checkNotNull(persister);

    final Closer closer = Closer.create();

    try {
        final PipedOutputStream pipedOutputStream = closer.register(new PipedOutputStream());
        final PipedInputStream pipedInputStream = closer.register(new PipedInputStream(pipedOutputStream));

        final Future<T> deserializeFuture = Executors.newSingleThreadExecutor().submit(new Callable<T>() {
            @SuppressWarnings("unchecked") // safe if persister is implemented correctly
            @Override
            public T call() throws Exception {
                try {
                    return (T) persister.deserialize(pipedInputStream, o.getClass());
                } catch (Exception e) {
                    pipedInputStream.close();
                    throw e;
                }
            }
        });

        try {
            persister.serialize(o, pipedOutputStream);
        } catch (Exception e) {
            if (!deserializeFuture.isDone()) {
                deserializeFuture.cancel(true);
                throw e;
            } else { // the future task had an exception and closed the stream, which caused this exception
                deserializeFuture.get(); // throws the exception
                throw new AssertionError("unreachable");
            }
        }
        return deserializeFuture.get(3, TimeUnit.SECONDS);
    } finally {
        closer.close();
    }
}

---

From source file:com.google.auto.service.processor.ServicesFiles.java

/**
 * Reads the set of service classes from a service file.
 *
 * @param input not {@code null}. Closed after use.
 * @return a not {@code null Set} of service class names.
 * @throws IOException/* w w  w  .ja  va 2  s.  com*/
 */
static Set<String> readServiceFile(InputStream input) throws IOException {
    HashSet<String> serviceClasses = new HashSet<String>();
    Closer closer = Closer.create();
    try {
        // TODO(gak): use CharStreams
        BufferedReader r = closer.register(new BufferedReader(new InputStreamReader(input, UTF_8)));
        String line;
        while ((line = r.readLine()) != null) {
            int commentStart = line.indexOf('#');
            if (commentStart >= 0) {
                line = line.substring(0, commentStart);
            }
            line = line.trim();
            if (!line.isEmpty()) {
                serviceClasses.add(line);
            }
        }
        return serviceClasses;
    } catch (Throwable t) {
        throw closer.rethrow(t);
    } finally {
        closer.close();
    }
}

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