Examples with Checksum java.util.zip.Checksum used on opensource projects

Example 31 with Checksum

use of java.util.zip.Checksum in project lucene-solr by apache.

the class ReplicationHandler method getConfFileInfoFromCache.

/**
   * For configuration files, checksum of the file is included because, unlike index files, they may have same content
   * but different timestamps.
   * <p/>
   * The local conf files information is cached so that everytime it does not have to compute the checksum. The cache is
   * refreshed only if the lastModified of the file changes
   */
List<Map<String, Object>> getConfFileInfoFromCache(NamedList<String> nameAndAlias, final Map<String, FileInfo> confFileInfoCache) {
    List<Map<String, Object>> confFiles = new ArrayList<>();
    synchronized (confFileInfoCache) {
        File confDir = new File(core.getResourceLoader().getConfigDir());
        Checksum checksum = null;
        for (int i = 0; i < nameAndAlias.size(); i++) {
            String cf = nameAndAlias.getName(i);
            File f = new File(confDir, cf);
            //must not happen
            if (!f.exists() || f.isDirectory())
                continue;
            FileInfo info = confFileInfoCache.get(cf);
            if (info == null || info.lastmodified != f.lastModified() || info.size != f.length()) {
                if (checksum == null)
                    checksum = new Adler32();
                info = new FileInfo(f.lastModified(), cf, f.length(), getCheckSum(checksum, f));
                confFileInfoCache.put(cf, info);
            }
            Map<String, Object> m = info.getAsMap();
            if (nameAndAlias.getVal(i) != null)
                m.put(ALIAS, nameAndAlias.getVal(i));
            confFiles.add(m);
        }
    }
    return confFiles;
}

Example 32 with Checksum

use of java.util.zip.Checksum in project lucene-solr by apache.

the class TestBufferedChecksum method testSimple.

public void testSimple() {
    Checksum c = new BufferedChecksum(new CRC32());
    c.update(1);
    c.update(2);
    c.update(3);
    assertEquals(1438416925L, c.getValue());
}

Example 33 with Checksum

use of java.util.zip.Checksum in project poi by apache.

the class IOUtils method calculateChecksum.

/**
     * Calculate checksum on all the data read from input stream.
     *
     * This should be more efficient than the equivalent code
     * {@code IOUtils.calculateChecksum(IOUtils.toByteArray(stream))}
     */
public static long calculateChecksum(InputStream stream) throws IOException {
    Checksum sum = new CRC32();
    byte[] buf = new byte[4096];
    int count;
    while ((count = stream.read(buf)) != -1) {
        if (count > 0) {
            sum.update(buf, 0, count);
        }
    }
    return sum.getValue();
}

Example 34 with Checksum

use of java.util.zip.Checksum in project iris by chicc999.

the class Message method getBodyCRC.

public long getBodyCRC() {
    if (bodyCRC == 0) {
        if (body != null && body.length > 0) {
            Checksum checksum = new Adler32();
            checksum.update(body, 0, body.length);
            bodyCRC = checksum.getValue();
        }
    }
    return bodyCRC;
}

Example 35 with Checksum

use of java.util.zip.Checksum in project processdash by dtuma.

the class PackageLaunchProfile method calculateContentToken.

private String calculateContentToken() throws IOException {
    List<File> files = new ArrayList<File>();
    for (FileSet fs : filesets) {
        DirectoryScanner ds = fs.getDirectoryScanner(getProject());
        for (String name : ds.getIncludedFiles()) files.add(new File(ds.getBasedir(), name));
    }
    if (files.isEmpty())
        throw new BuildException("You must designate at least one file " + "to include in the launch profile.");
    Collections.sort(files, FILENAME_SORTER);
    Checksum ck = new Adler32();
    for (File f : files) calcChecksum(f, ck);
    return Long.toString(Math.abs(ck.getValue()), Character.MAX_RADIX);
}