Package org.apache.pig.backend.hadoop.datastorage

Examples of org.apache.pig.backend.hadoop.datastorage.HDataStorage

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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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            properties.setProperty(FILE_SYSTEM_LOCATION, nameNode);
        }
    
        log.info("Connecting to hadoop file system at: "  + (nameNode==null? LOCAL: nameNode) )  ;
        // constructor sets DEFAULT_REPLICATION_FACTOR_KEY
        ds = new HDataStorage(properties);
               
        if(cluster != null && !cluster.equalsIgnoreCase(LOCAL)){
            log.info("Connecting to map-reduce job tracker at: " + jc.get(JOB_TRACKER_LOCATION));
        }
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        return lastConf;
    }

    public RecordReader<Text, Tuple> makeReader(JobConf job) throws IOException {
        lastConf = job;       
        DataStorage store = new HDataStorage(ConfigurationUtil.toProperties(job));
        // if the execution is against Mapred DFS, set
        // working dir to /user/<userid>
        if(pigContext.getExecType() == ExecType.MAPREDUCE)
            store.setActiveContainer(store.asContainer("/user/" + job.getUser()));
        wrapped.init(store);
       
        job.set("map.target.ops", ObjectSerializer.serialize(targetOps));
        // Mimic org.apache.hadoop.mapred.FileSplit if feasible...
        String[] locations = wrapped.getLocations();
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    public void connect() throws ExecException {

        switch (execType) {
            case LOCAL:
            {
                lfs = new HDataStorage(URI.create("file:///"),
                                       new Properties());
               
                dfs = lfs;
                executionEngine = new LocalExecutionEngine(this);
            }
            break;

            case MAPREDUCE:
            {
                executionEngine = new HExecutionEngine (this);

                executionEngine.init();
               
                dfs = executionEngine.getDataStorage();
               
                lfs = new HDataStorage(URI.create("file:///"),
                                        new Properties());               
            }
            break;
           
            default:
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            properties.setProperty(FILE_SYSTEM_LOCATION, nameNode);
        }
    
        log.info("Connecting to hadoop file system at: "  + (nameNode==null? LOCAL: nameNode) )  ;
        // constructor sets DEFAULT_REPLICATION_FACTOR_KEY
        ds = new HDataStorage(properties);
               
        if(cluster != null && !cluster.equalsIgnoreCase(LOCAL)){
            log.info("Connecting to map-reduce job tracker at: " + jc.get(JOB_TRACKER_LOCATION));
        }
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        return openDFSFile(fileName, ConfigurationUtil.toProperties(conf));

    }

    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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        Set<ElementDescriptor> metaFileSet = new HashSet<ElementDescriptor>();
        String[] locations = LoadFunc.getPathStrings(path);
        for (String loc : locations) {
            DataStorage storage;
           
            storage = new HDataStorage(new Path(loc).toUri(), ConfigurationUtil.toProperties(conf));
           
            String fullPath = FileLocalizer.fullPath(loc, storage);

            if(storage.isContainer(fullPath)) {
                ElementDescriptor metaFilePath = storage.asElement(fullPath, metaname);
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    // Implementation of StoreMetaData interface

    @Override
    public void storeStatistics(ResourceStatistics stats, String location, Job job) throws IOException {
        Configuration conf = job.getConfiguration();
        DataStorage storage = new HDataStorage(ConfigurationUtil.toProperties(conf));
        ElementDescriptor statFilePath = storage.asElement(location, statFileName);
        if(!statFilePath.exists() && stats != null) {
            try {
                new ObjectMapper().writeValue(statFilePath.create(), stats);
            } catch (JsonGenerationException e) {
                log.warn("Unable to write Resource Statistics for "+location);
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    }

    @Override
    public void storeSchema(ResourceSchema schema, String location, Job job) throws IOException {
        Configuration conf = job.getConfiguration();
        DataStorage storage = new HDataStorage(ConfigurationUtil.toProperties(conf));
        ElementDescriptor schemaFilePath = storage.asElement(location, schemaFileName);
        if(!schemaFilePath.exists() && schema != null) {
            try {
                new ObjectMapper().writeValue(schemaFilePath.create(), schema);
            } catch (JsonGenerationException e) {
                log.warn("Unable to write Resource Statistics for "+location);
                e.printStackTrace();
            } catch (JsonMappingException e) {
                log.warn("Unable to write Resource Statistics for "+location);
                e.printStackTrace();
            }
        }
        if (printHeaders) {
            ElementDescriptor headerFilePath = storage.asElement(location, headerFileName);
            if (!headerFilePath.exists()) {
                OutputStream os = headerFilePath.create();
                try {
                    String[] names = schema.fieldNames();
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Related Classes of org.apache.pig.backend.hadoop.datastorage.HDataStorage

  • org.apache.hadoop.dfs.DistributedFileSystem
  • org.apache.hadoop.fs.Path
  • org.apache.hadoop.hdfs.DistributedFileSystem
  • org.apache.pig.backend.hadoop.executionengine.HExecutionEngine
  • org.apache.pig.backend.hadoop.executionengine.mapreduceExec.PigInputFormat
  • org.apache.pig.backend.hadoop.executionengine.mapreduceExec.SliceWrapper
  • org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigInputFormat
  • org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.SliceWrapper
  • org.apache.pig.builtin.BinStorage
  • org.apache.pig.builtin.JsonMetadata
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