Example usage for java.io ObjectOutputStream flush

Introduction

In this page you can find the example usage for java.io ObjectOutputStream flush.

Prototype

public void flush() throws IOException 

Source Link

Document

Flushes the stream.

Usage

From source file:org.shaman.database.Benchmark.java

/**
 * prints the file size//from  ww  w. j  a  v a 2  s . c om
 * @param roots the roots from the different passes
 */
private void printFileSizes(Record... roots) throws IOException {
    //result array
    int size;

    String format = "%1$,11d";
    System.out.println("passes       database          serial      compressed             xml");

    //save it
    for (int i = 0; i < roots.length; i++) {
        Record root = roots[i];
        System.out.print("pass " + (i + 1) + "   ");
        //database
        ArrayOutput ao = new ArrayOutput();
        Database db = new Database(root);
        db.save(ao, FailOnErrorHandler.INSTANCE);
        size = ao.getTotalSize();
        System.out.printf(format, size);
        System.out.print("B    ");

        //uncompressed serialization
        CountingOutputStream out = new CountingOutputStream(new NullOutputStream());
        ObjectOutputStream dos = new ObjectOutputStream(out);
        dos.writeObject(root);
        dos.flush();
        size = out.getCount();
        System.out.printf(format, size);
        System.out.print("B    ");

        //compressed serialization
        out.resetCount();
        dos = new ObjectOutputStream(new GZIPOutputStream(out));
        dos.writeObject(root);
        dos.flush();
        size = out.getCount();
        System.out.printf(format, size);
        System.out.print("B    ");

        //xml
        out.resetCount();
        XMLEncoder xml = new XMLEncoder(out);
        xml.writeObject(root);
        xml.flush();
        size = out.getCount();
        System.out.printf(format, size);
        System.out.println("B");
    }

}

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From source file:com.joliciel.talismane.machineLearning.AbstractMachineLearningModel.java

@Override
public final void persist(File modelFile) {
    try {//  w  w  w .j av  a  2 s  . c om
        ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(modelFile, false));
        Writer writer = new BufferedWriter(new OutputStreamWriter(zos, "UTF-8"));

        zos.putNextEntry(new ZipEntry("algorithm.txt"));
        writer.write(this.getAlgorithm().name());
        writer.flush();
        zos.flush();

        for (String descriptorKey : descriptors.keySet()) {
            zos.putNextEntry(new ZipEntry(descriptorKey + "_descriptors.txt"));
            List<String> descriptorList = descriptors.get(descriptorKey);
            for (String descriptor : descriptorList) {
                writer.write(descriptor + "\n");
                writer.flush();
            }
            zos.flush();

        }

        zos.putNextEntry(new ZipEntry("attributes.txt"));
        for (String name : this.modelAttributes.keySet()) {
            String value = this.modelAttributes.get(name);
            writer.write(name + "\t" + value + "\n");
            writer.flush();
        }

        for (String name : this.dependencies.keySet()) {
            Object dependency = this.dependencies.get(name);
            zos.putNextEntry(new ZipEntry(name + "_dependency.obj"));
            ObjectOutputStream oos = new ObjectOutputStream(zos);
            try {
                oos.writeObject(dependency);
            } finally {
                oos.flush();
            }
            zos.flush();
        }

        this.persistOtherEntries(zos);

        if (this.externalResources != null) {
            zos.putNextEntry(new ZipEntry("externalResources.obj"));
            ObjectOutputStream oos = new ObjectOutputStream(zos);
            try {
                oos.writeObject(externalResources);
            } finally {
                oos.flush();
            }
            zos.flush();
        }

        this.writeDataToStream(zos);

        zos.putNextEntry(new ZipEntry("model.bin"));
        this.writeModelToStream(zos);
        zos.flush();

        zos.close();
    } catch (IOException ioe) {
        LogUtils.logError(LOG, ioe);
        throw new RuntimeException(ioe);
    }
}

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From source file:deepschema.ExtractingTool.java

/**
 * Caches classes and subclasses to file.
 * //from ww w .ja  v  a2  s.com
 * @param operation : "read" or "write"
 */
@SuppressWarnings("unchecked")
void cache(String action) {
    final String cacheFile = ".cache";
    try {
        switch (action) {
        case "read": {
            ObjectInputStream objectInputStream = new ObjectInputStream(new FileInputStream(cacheFile));
            classes = (Map<Integer, WikidataClassProperties>) ((ObjectInputStream) objectInputStream)
                    .readObject();
            instances = (Map<Integer, WikidataInstanceProperties>) ((ObjectInputStream) objectInputStream)
                    .readObject();
            objectInputStream.close();
        }
        case "write": {
            ObjectOutputStream objectOutputStream = new ObjectOutputStream(new FileOutputStream(cacheFile));
            objectOutputStream.writeObject(classes);
            objectOutputStream.writeObject(instances);
            objectOutputStream.flush();
            objectOutputStream.close();
        }
        }
    } catch (ClassNotFoundException | IOException e) {
        System.err.println("Problem while reading/writing from/to cache.");
        e.printStackTrace();
    }
}

---

From source file:edu.umass.cs.msocket.common.policies.GeoLoadProxyPolicy.java

/**
 * @throws Exception if a GNS error occurs
 * @see edu.umass.cs.msocket.common.policies.ProxySelectionPolicy#getNewProxy()
 *///from ww  w .  j a v a2  s  .c o m
@Override
public List<InetSocketAddress> getNewProxy() throws Exception {
    // Lookup for active location service GUIDs
    final UniversalGnsClient gnsClient = gnsCredentials.getGnsClient();
    final GuidEntry guidEntry = gnsCredentials.getGuidEntry();
    JSONArray guids;
    try {
        guids = gnsClient.fieldRead(proxyGroupName, GnsConstants.ACTIVE_LOCATION_FIELD, guidEntry);
    } catch (Exception e) {
        throw new GnsException("Could not find active location services (" + e + ")");
    }

    // Try every location proxy in the list until one works
    for (int i = 0; i < guids.length(); i++) {
        // Retrieve the location service IP and connect to it
        String locationGuid = guids.getString(i);
        String locationIP = gnsClient.fieldRead(locationGuid, GnsConstants.LOCATION_SERVICE_IP, guidEntry)
                .getString(0);
        logger.fine("Contacting location service " + locationIP + " to request " + numProxies + " proxies");

        // Location IP is stored as host:port
        StringTokenizer st = new StringTokenizer(locationIP, ":");
        try {
            // Protocol is send the number of desired proxies and receive strings
            // containing proxy IP:port
            Socket s = new Socket(st.nextToken(), Integer.parseInt(st.nextToken()));
            ObjectOutputStream oos = new ObjectOutputStream(s.getOutputStream());
            ObjectInputStream ois = new ObjectInputStream(s.getInputStream());
            oos.writeInt(numProxies);
            oos.flush();
            List<InetSocketAddress> result = new LinkedList<InetSocketAddress>();
            while (!s.isClosed() && result.size() < numProxies) {
                String proxyIP = ois.readUTF();
                StringTokenizer stp = new StringTokenizer(proxyIP, ":");
                result.add(new InetSocketAddress(stp.nextToken(), Integer.parseInt(stp.nextToken())));
            }
            if (!s.isClosed()) // We receive all the proxies we need, just close the
                               // socket
                s.close();
            return result;
        } catch (Exception e) {
            logger.info("Failed to obtain proxy from location service" + locationIP + " (" + e + ")");
        }
    }

    throw new GnsException("Could not find any location service to provide a geolocated proxy");
}

---

From source file:org.hyperledger.fabric.sdk.Member.java

/**
 * Save the state of this member to the key value store.
 *//*ww w. j a v a  2 s  . c o  m*/
public void saveState() {
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    try {
        ObjectOutputStream oos = new ObjectOutputStream(bos);
        oos.writeObject(this);
        oos.flush();
        keyValStore.setValue(keyValStoreName, Hex.toHexString(bos.toByteArray()));
        bos.close();
    } catch (IOException e) {
        logger.debug(String.format("Could not save state of member %s", this.name), e);
    }
}

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From source file:edu.usf.cutr.siri.util.SiriUtils.java

/**
 * Write the given object to Android internal storage for this app
 * //from   w ww  .j ava  2 s .  c o m
 * @param object
 *            serializable object to be written to cache (ObjectReader,
 *            ObjectMapper, or XmlReader)
 * @return true if object was successfully written to cache, false if it was
 *         not
 */
private synchronized static boolean writeToCache(Serializable object) {

    FileOutputStream fileStream = null;
    ObjectOutputStream objectStream = null;
    String fileName = "";
    boolean success = false;

    try {
        if (object instanceof XmlMapper) {
            fileName = XML_MAPPER + CACHE_FILE_EXTENSION;
        } else if (object instanceof ObjectMapper) {
            // ObjectMapper check must come after XmlMapper check,
            // since XmlMapper is subclass of ObjectMapper
            fileName = OBJECT_MAPPER + CACHE_FILE_EXTENSION;
        } else if (object instanceof ObjectReader) {
            fileName = OBJECT_READER + CACHE_FILE_EXTENSION;
        }

        cacheWriteStartTime = System.nanoTime();
        fileStream = new FileOutputStream(fileName);
        objectStream = new ObjectOutputStream(fileStream);
        objectStream.writeObject(object);
        objectStream.flush();
        fileStream.getFD().sync();
        cacheWriteEndTime = System.nanoTime();
        success = true;

        // Get size of serialized object
        File file = new File(fileName);

        long fileSize = file.length();

        System.out.println("Wrote " + fileName + " to cache (" + fileSize + " bytes) in "
                + df.format(getLastCacheWriteTime() / 1000000.0) + " ms.");
    } catch (IOException e) {
        // Reset timestamps to show there was an error
        cacheWriteStartTime = 0;
        cacheWriteEndTime = 0;
        System.out.println("Couldn't write object to cache: " + e);
        e.printStackTrace();
    } finally {
        try {
            if (objectStream != null) {
                objectStream.close();
            }
            if (fileStream != null) {
                fileStream.close();
            }
        } catch (Exception e) {
            System.out.println("Error closing file connections: " + e);
        }
    }

    return success;
}

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From source file:com.all.dht.util.DhtFileUtils.java

public void persistObjectToFile(Serializable object, String routeTableFile) throws IOException {
    ObjectOutputStream out = new ObjectOutputStream(
            new BufferedOutputStream(new SecureOutputStream(new FileOutputStream(routeTableFile))));
    out.writeObject(object);/*from w  ww . ja  va2s . com*/
    out.flush();
    out.close();
}

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From source file:com.nebhale.jsonpath.JsonPathTest.java

@Test
public void serializable() throws IOException, ClassNotFoundException {
    assertTrue(Serializable.class.isAssignableFrom(JsonPath.class));

    JsonPath jsonPath = JsonPath.compile("$.store.book[0].title");
    assertEquals("Sayings of the Century", jsonPath.read(STRING_VALID, String.class));

    byte[] serialized;
    ObjectOutputStream out = null;
    try {//from  ww w.  j  av  a2s  . c  o m
        ByteArrayOutputStream bytes = new ByteArrayOutputStream();
        out = new ObjectOutputStream(bytes);

        out.writeObject(jsonPath);
        out.flush();

        serialized = bytes.toByteArray();
    } finally {
        if (out != null) {
            try {
                out.close();
            } catch (IOException e) {
            }
        }
    }

    JsonPath newJsonPath;
    ObjectInputStream in = null;
    try {
        in = new ObjectInputStream(new ByteArrayInputStream(serialized));

        newJsonPath = (JsonPath) in.readObject();
    } finally {
        if (in != null) {
            in.close();
        }
    }

    assertEquals("Sayings of the Century", newJsonPath.read(STRING_VALID, String.class));
}

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From source file:com.hs.mail.smtp.message.SmtpMessage.java

public void store() throws IOException {
    File file = getControlFile();
    ObjectOutputStream os = null;
    try {/*w  w w. j a va2s.c o  m*/
        OutputStream out = new BufferedOutputStream(new FileOutputStream(file), 1024 * 4);
        os = new ObjectOutputStream(out);
        os.writeObject(this);
        os.flush();
    } finally {
        IOUtils.closeQuietly(os);
    }
}

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