Example usage for com.google.common.hash Hashing md5

Introduction

In this page you can find the example usage for com.google.common.hash Hashing md5.

Prototype

public static HashFunction md5() 

Source Link

Document

Returns a hash function implementing the MD5 hash algorithm (128 hash bits) by delegating to the MD5 MessageDigest .

Usage

From source file:org.eclipse.che.api.vfs.server.impl.memory.MemoryVirtualFile.java

@Override
public LazyIterator<Pair<String, String>> countMd5Sums() throws ServerException {
    checkExist();/* w  w w.j ava2s  .  c  o m*/
    if (isFile()) {
        return LazyIterator.emptyIterator();
    }

    final List<Pair<String, String>> hashes = new ArrayList<>();
    final int trimPathLength = getPath().length() + 1;
    final HashFunction hashFunction = Hashing.md5();
    final ValueHolder<ServerException> errorHolder = new ValueHolder<>();
    accept(new VirtualFileVisitor() {
        @Override
        public void visit(final VirtualFile virtualFile) {
            try {
                if (virtualFile.isFile()) {
                    try (InputStream stream = virtualFile.getContent().getStream()) {
                        final String hexHash = ByteSource.wrap(ByteStreams.toByteArray(stream))
                                .hash(hashFunction).toString();
                        hashes.add(Pair.of(hexHash, virtualFile.getPath().substring(trimPathLength)));
                    } catch (ForbiddenException e) {
                        throw new ServerException(e.getServiceError());
                    } catch (IOException e) {
                        throw new ServerException(e);
                    }
                } else {
                    final LazyIterator<VirtualFile> children = virtualFile.getChildren(VirtualFileFilter.ALL);
                    while (children.hasNext()) {
                        children.next().accept(this);
                    }
                }
            } catch (ServerException e) {
                errorHolder.set(e);
            }
        }
    });
    final ServerException error = errorHolder.get();
    if (error != null) {
        throw error;
    }
    return LazyIterator.fromList(hashes);
}

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From source file:org.hawkular.alerts.engine.impl.PartitionManagerImpl.java

/**
 * Distribute triggers on nodes using a consistent hashing strategy.
 * This strategy allows to scale and minimize changes and re-distribution when cluster changes.
 *
 * @param entries a list of entries to distribute
 * @param buckets a table of nodes//w  ww.  j  a  va 2s  . co m
 * @return a map of entries distributed across nodes
 */
public Map<PartitionEntry, Integer> calculatePartition(List<PartitionEntry> entries,
        Map<Integer, Integer> buckets) {
    if (entries == null) {
        throw new IllegalArgumentException("entries must be not null");
    }
    if (isEmpty(buckets)) {
        throw new IllegalArgumentException("entries must be not null");
    }
    HashFunction md5 = Hashing.md5();
    int numBuckets = buckets.size();
    Map<PartitionEntry, Integer> newPartition = new HashMap<>();
    for (PartitionEntry entry : entries) {
        newPartition.put(entry, buckets.get(Hashing.consistentHash(md5.hashInt(entry.hashCode()), numBuckets)));
    }
    return newPartition;
}

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From source file:net.revelc.code.formatter.FormatterMojo.java

/**
 * Md5hash.//from www .  j  a va 2s.c o  m
 *
 * @param str the str
 * @return the string
 * @throws UnsupportedEncodingException the unsupported encoding exception
 */
private String md5hash(String str) throws UnsupportedEncodingException {
    return Hashing.md5().hashBytes(str.getBytes(this.encoding)).toString();
}

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From source file:org.hawkular.alerts.engine.impl.PartitionManagerImpl.java

/**
 * Distribute a new entry across buckets using a consistent hashing strategy.
 *
 * @param newEntry the new entry to distribute
 * @param buckets a table of nodes/*from   ww  w. j a  va 2  s  .com*/
 * @return a code of the node which the new entry is placed
 */
public Integer calculateNewEntry(PartitionEntry newEntry, Map<Integer, Integer> buckets) {
    if (newEntry == null) {
        throw new IllegalArgumentException("newEntry must be not null");
    }
    if (isEmpty(buckets)) {
        throw new IllegalArgumentException("buckets must be not null");
    }
    HashFunction md5 = Hashing.md5();
    int numBuckets = buckets.size();
    return buckets.get(Hashing.consistentHash(md5.hashInt(newEntry.hashCode()), numBuckets));
}

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From source file:org.mycore.frontend.cli.MCRIFS2Commands.java

private static void fixFileEntry(File node, String content_store, String derivate_id, String storage_base,
        boolean check_only) {
    LOGGER.debug("fixFileEntry : name = " + node.getName());
    String storageid = node.getAbsolutePath().substring(storage_base.length()).replace("\\", "/");
    LOGGER.debug("fixFileEntry : storageid = " + storageid);
    String id = "";
    String md5_old = "";
    long size_old = 0;
    boolean foundEntry = false;
    MCRSession mcrSession = MCRSessionMgr.getCurrentSession();
    boolean transactionActive = mcrSession.isTransactionActive();
    if (!transactionActive) {
        mcrSession.beginTransaction();/*from  w  w w  .ja  v  a  2  s.c  o m*/
    }
    EntityManager em = MCREntityManagerProvider.getCurrentEntityManager();
    try {
        CriteriaBuilder cb = em.getCriteriaBuilder();
        CriteriaQuery<MCRFSNODES> query = cb.createQuery(MCRFSNODES.class);
        Root<MCRFSNODES> nodes = query.from(MCRFSNODES.class);
        try {
            MCRFSNODES fsNode = em.createQuery(query.where(cb.equal(nodes.get(MCRFSNODES_.owner), derivate_id),
                    cb.equal(nodes.get(MCRFSNODES_.storeid), content_store),
                    cb.equal(nodes.get(MCRFSNODES_.storageid), storageid),
                    cb.equal(nodes.get(MCRFSNODES_.type), "F"))).getSingleResult();
            LOGGER.debug("Found file entry for " + storageid);
            foundEntry = true;
            id = fsNode.getId();
            md5_old = fsNode.getMd5();
            size_old = fsNode.getSize();
            em.detach(fsNode);
        } catch (NoResultException e) {
            LOGGER.error("Can't find file entry for " + storageid);
            if (check_only)
                return;
        } catch (NonUniqueResultException e) {
            LOGGER.error("Non unique file entry for " + storageid);
            return;
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    // check fctid, size and MD5 of the file
    String fctid = "";
    String md5 = "";
    try {
        MCRContentInputStream cis = new MCRContentInputStream(new FileInputStream(node));
        byte[] header = cis.getHeader();
        fctid = MCRFileContentTypeFactory.detectType(node.getName(), header).getID();
        cis.close();
        md5 = Files.hash(node, Hashing.md5()).toString();
    } catch (MCRException | IOException e1) {
        e1.printStackTrace();
        return;
    }
    long size = node.length();
    LOGGER.debug("size old : " + Long.toString(size_old) + " <--> size : " + Long.toString(size));
    LOGGER.debug("MD5 old : " + md5_old + " <--> MD5 : " + md5);
    if (size_old == size && md5_old.equals(md5)) {
        return;
    }
    if (foundEntry && size_old != size) {
        LOGGER.warn("Wrong file size for " + storageid + " : " + size_old + " <-> " + size);
    }
    if (foundEntry && !md5.equals(md5_old)) {
        LOGGER.warn("Wrong file md5 for " + storageid + " : " + md5_old + " <-> " + md5);
    }
    if (check_only)
        return;
    // fix entry
    LOGGER.info("Fix entry for file " + storageid);
    if (!foundEntry) {
        MCRFileMetadataManager fmmgr = MCRFileMetadataManager.instance();
        id = fmmgr.createNodeID();
    }
    String pid = null;
    try {
        pid = getParentID(node, derivate_id);
    } catch (NoResultException e1) {
        LOGGER.error("Can't find parent id of directory for file " + storageid);
    } catch (NonUniqueResultException e1) {
        LOGGER.error("The directory entry for " + derivate_id + " and " + node.getParentFile().getName()
                + " is not unique!");
        return;
    }
    try {
        MCRFSNODES mcrfsnodes = new MCRFSNODES();
        mcrfsnodes.setId(id);
        mcrfsnodes.setPid(pid);
        mcrfsnodes.setType("F");
        mcrfsnodes.setOwner(derivate_id);
        mcrfsnodes.setName(node.getName());
        mcrfsnodes.setSize(size);
        mcrfsnodes.setDate(new Date(node.lastModified()));
        mcrfsnodes.setStoreid(content_store);
        mcrfsnodes.setStorageid(storageid);
        mcrfsnodes.setFctid(fctid);
        mcrfsnodes.setMd5(md5);
        em.merge(mcrfsnodes);
        mcrSession.commitTransaction();
        LOGGER.debug("Entry " + node.getName() + " fixed.");
    } catch (PersistenceException pe) {
        mcrSession.rollbackTransaction();
        pe.printStackTrace();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

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From source file:org.apache.hadoop.hive.ql.hooks.LineageLogger.java

/**
 * Generate query string md5 hash./*w w w  .  j  a va 2s. c  o m*/
 */
private String getQueryHash(String queryStr) {
    Hasher hasher = Hashing.md5().newHasher();
    hasher.putString(queryStr);
    return hasher.hash().toString();
}

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From source file:net.sourceforge.fenixedu.presentationTier.Action.person.ExternalAppsDA.java

public ActionForward showServiceAgreement(ActionMapping mapping, ActionForm actionForm,
        HttpServletRequest request, HttpServletResponse response) throws Exception {
    final String serviceAgreementHtml = getServiceAgreementHtml();
    request.setAttribute("serviceAgreement", serviceAgreementHtml);
    request.setAttribute("serviceAgreementChecksum",
            Hashing.md5().newHasher().putString(serviceAgreementHtml, Charsets.UTF_8).hash().toString());
    PortalLayoutInjector.skipLayoutOn(request);
    return new ActionForward(null, "/auth/showServiceAgreement.jsp", false, "");
}

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From source file:org.fabrician.enabler.DockerContainer.java

public ProcessWrapper getExecCmdProcessWrapper(String execCmd) throws Exception {
    String command = "docker exec -d " + dockerContainerTag + " " + execCmd;
    if (useSudo) {
        command = "sudo " + command;
    }/*ww w. jav  a2  s .  c  o m*/
    File workDir = new File(getWorkDir());
    HashFunction hf = Hashing.md5();
    HashCode hc = hf.newHasher().putString(command, Charsets.UTF_8).hash();
    String cmd_pid = "_cmd_" + BaseEncoding.base64Url().encode(hc.asBytes()) + ".pid";
    try {
        String engineOS = getEngineProperty(EngineProperties.OS);
        ProcessWrapper p = getProcessWrapper(command, workDir, engineOS + cmd_pid);
        return p;
    } catch (Exception ex) {
        getEngineLogger().log(Level.SEVERE,
                "while getting a process wrapper for 'docker exec' command [" + execCmd + "]", ex);
        throw ex;
    }
}

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From source file:com.android.sdklib.devices.DeviceManager.java

/**
 * Returns the hardware properties defined in
 * {@link AvdManager#HARDWARE_INI} as a {@link Map}.
 *
 * This is intended to be dumped in the config.ini and already contains
 * the device name, manufacturer and device hash.
 *
 * @param d The {@link Device} from which to derive the hardware properties.
 * @return A {@link Map} of hardware properties.
 *//*from   w  w  w  .j  ava  2  s  . c  om*/
@NonNull
public static Map<String, String> getHardwareProperties(@NonNull Device d) {
    Map<String, String> props = getHardwareProperties(d.getDefaultState());
    for (State s : d.getAllStates()) {
        if (s.getKeyState().equals(KeyboardState.HIDDEN)) {
            props.put("hw.keyboard.lid", getBooleanVal(true));
        }
    }

    HashFunction md5 = Hashing.md5();
    Hasher hasher = md5.newHasher();

    ArrayList<String> keys = new ArrayList<String>(props.keySet());
    Collections.sort(keys);
    for (String key : keys) {
        if (key != null) {
            hasher.putString(key, Charsets.UTF_8);
            String value = props.get(key);
            hasher.putString(value == null ? "null" : value, Charsets.UTF_8);
        }
    }
    // store the hash method for potential future compatibility
    String hash = "MD5:" + hasher.hash().toString();
    props.put(AvdManager.AVD_INI_DEVICE_HASH_V2, hash);
    props.remove(AvdManager.AVD_INI_DEVICE_HASH_V1);

    props.put(AvdManager.AVD_INI_DEVICE_NAME, d.getId());
    props.put(AvdManager.AVD_INI_DEVICE_MANUFACTURER, d.getManufacturer());
    return props;
}

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From source file:org.apache.impala.analysis.Vertex.java

private String getQueryHash(String queryStr) {
    Hasher hasher = Hashing.md5().newHasher();
    hasher.putString(queryStr);
    return hasher.hash().toString();
}

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