Package org.apache.pig.backend.datastorage

Examples of org.apache.pig.backend.datastorage.ElementDescriptor

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    protected void processMove(String src, String dst) throws IOException
    {
        executeBatch();

        try {
            ElementDescriptor srcPath = mDfs.asElement(src);
            ElementDescriptor dstPath = mDfs.asElement(dst);
           
            if (!srcPath.exists()) {
                throw new IOException("File or directory " + src + " does not exist.");               
            }
           
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    protected void processCopy(String src, String dst) throws IOException
    {
        executeBatch();

        try {
            ElementDescriptor srcPath = mDfs.asElement(src);
            ElementDescriptor dstPath = mDfs.asElement(dst);
           
            srcPath.copy(dstPath, mConf, false);
        }
        catch (DataStorageException e) {
            throw new IOException("Failed to copy " + src + " to " + dst, e);
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    protected void processCopyToLocal(String src, String dst) throws IOException
    {
        executeBatch();

        try {
            ElementDescriptor srcPath = mDfs.asElement(src);
            ElementDescriptor dstPath = mLfs.asElement(dst);
           
            srcPath.copy(dstPath, false);
        }
        catch (DataStorageException e) {
            throw new IOException("Failed to copy " + src + "to (locally) " + dst, e);
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    protected void processCopyFromLocal(String src, String dst) throws IOException
    {
        executeBatch();

        try {
            ElementDescriptor srcPath = mLfs.asElement(src);
            ElementDescriptor dstPath = mDfs.asElement(dst);
           
            srcPath.copy(dstPath, false);
        }
        catch (DataStorageException e) {
            throw new IOException("Failed to copy (loally) " + src + "to " + dst, e);
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    }

    @Override
    protected void processRemove(String path, String options ) throws IOException
    {
        ElementDescriptor dfsPath = mDfs.asElement(path);

        executeBatch();
       
        if (!dfsPath.exists()) {
            if (options == null || !options.equalsIgnoreCase("force")) {
                throw new IOException("File or directory " + path + " does not exist.");
            }
        }
        else {
           
            dfsPath.delete();
        }
    }
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            return;
        }
       
        System.out.println("Renaming " + oldName + " to " + newName);

        ElementDescriptor dst = null;
        ElementDescriptor src = null;           

        try {
            dst = dfs.asElement(newName);
            src = dfs.asElement(oldName);           
        }
        catch (DataStorageException e) {
            byte errSrc = getErrorSource();           
            int errCode = 0;
            switch(errSrc) {
            case PigException.REMOTE_ENVIRONMENT:
                errCode = 6005;
                break;
            case PigException.USER_ENVIRONMENT:
                errCode = 4005;
                break;
            default:
                errCode = 2038;
                    break;
            }
            String msg = "Unable to rename " + oldName + " to " + newName;           
            throw new ExecException(msg, errCode, errSrc, e);
        }

        if (dst.exists()) {
            dst.delete();
        }
       
        src.rename(dst);

    }
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        if (localDst) {
            dstStorage = lfs;
        }
       
        ElementDescriptor srcElement = null;
        ElementDescriptor dstElement = null;

        try {
            srcElement = dfs.asElement(src);
            dstElement = dstStorage.asElement(dst);
        }
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    }

    public static InputStream openDFSFile(String fileName, Properties properties) throws IOException{
        DataStorage dds = new HDataStorage(properties);
        ElementDescriptor elem = dds.asElement(fileName);
        return openDFSFile(elem);
    }
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        return getSize(fileName, ConfigurationUtil.toProperties(conf));
    }
   
    public static long getSize(String fileName, Properties properties) throws IOException {
      DataStorage dds = new HDataStorage(properties);
        ElementDescriptor elem = dds.asElement(fileName);
      
        // recursively get all the files under this path
        ElementDescriptor[] allElems = getFileElementDescriptors(elem);
       
        long size = 0;
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        List<ElementDescriptor> filePaths = new ArrayList<ElementDescriptor>();
        for (int m = 0; m < elems.length; m++) {
            paths.add(elems[m]);
        }
        for (int j = 0; j < paths.size(); j++) {
            ElementDescriptor fullPath = store.asElement(store
                    .getActiveContainer(), paths.get(j));
            // Skip hadoop's private/meta files ...
            if (fullPath.systemElement()) {
                continue;
            }
           
            if (fullPath instanceof ContainerDescriptor) {
                for (ElementDescriptor child : ((ContainerDescriptor) fullPath)) {
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