Examples of org.apache.hadoop.hbase.io.HbaseMapWritable

org.apache.hadoop.hbase.io.HbaseMapWritable
A Writable Map. Like {@link org.apache.hadoop.io.MapWritable} but dumb. It will failif passed a value type that it has not already been told about. Its been primed with hbase Writables and byte []. Keys are always byte arrays. @param key TODO: Parameter K is never used, could be removed. @param < V> value Expects a Writable or byte [].

   * @return Map of columns to values.  Map is empty if row does not exist.
   * @throws IOException
   */
  public SortedMap<Text, byte[]> getRow(Text row, long ts) throws IOException {
    checkClosed();
    HbaseMapWritable value = null;
    for (int tries = 0; tries < numRetries; tries++) {
      HRegionLocation r = getRegionLocation(row);
      HRegionInterface server =
        connection.getHRegionConnection(r.getServerAddress());
      
      try {
        value = server.getRow(r.getRegionInfo().getRegionName(), row, ts);
        break;
        
      } catch (IOException e) {
        if (e instanceof RemoteException) {
          e = RemoteExceptionHandler.decodeRemoteException((RemoteException) e);
        }
        if (tries == numRetries - 1) {
          // No more tries
          throw e;
        }
        if (LOG.isDebugEnabled()) {
          LOG.debug("reloading table servers because: " + e.getMessage());
        }
        r = getRegionLocation(row, true);
      }
      try {
        Thread.sleep(this.pause);
      } catch (InterruptedException x) {
        // continue
      }
    }
    SortedMap<Text, byte[]> results = new TreeMap<Text, byte[]>();
    if (value != null && value.size() != 0) {
      for (Map.Entry<Writable, Writable> e: value.entrySet()) {
        HStoreKey key = (HStoreKey) e.getKey();
        results.put(key.getColumn(),
            ((ImmutableBytesWritable) e.getValue()).get());
      }
    }

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    throws IOException {
      checkClosed();
      if (this.closed) {
        return false;
      }
      HbaseMapWritable values = null;
      // Clear the results so we don't inherit any values from any previous
      // calls to next.
      results.clear();
      do {
        values = server.next(scannerId);
      } while (values != null && values.size() == 0 && nextScanner());


      if (values != null && values.size() != 0) {
        for (Map.Entry<Writable, Writable> e: values.entrySet()) {
          HStoreKey k = (HStoreKey) e.getKey();
          key.setRow(k.getRow());
          key.setVersion(k.getTimestamp());
          key.setColumn(EMPTY_COLUMN);
          results.put(k.getColumn(),
              ((ImmutableBytesWritable) e.getValue()).get());
        }
      }
      return values == null ? false : values.size() != 0;
    }

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      long scannerId = -1L;
      try {
        scannerId =
          server.openScanner(firstMetaServer.getRegionInfo().getRegionName(),
            COL_REGIONINFO_ARRAY, tableName, System.currentTimeMillis(), null);
        HbaseMapWritable values = server.next(scannerId);
        if (values == null || values.size() == 0) {
          break;
        }
        boolean found = false;
        for (Map.Entry<Writable, Writable> e: values.entrySet()) {
          HStoreKey key = (HStoreKey) e.getKey();
          if (key.getColumn().equals(COL_REGIONINFO)) {
            info = (HRegionInfo) Writables.getWritable(
                  ((ImmutableBytesWritable) e.getValue()).get(), info);

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          server.openScanner(firstMetaServer.getRegionInfo().getRegionName(),
            COL_REGIONINFO_ARRAY, tableName, System.currentTimeMillis(), null);
        boolean isenabled = false;
        
        while (true) {
          HbaseMapWritable values = server.next(scannerId);
          if (values == null || values.size() == 0) {
            if (valuesfound == 0) {
              throw new NoSuchElementException(
                  "table " + tableName + " not found");
            }
            break;
          }
          valuesfound += 1;
          for (Map.Entry<Writable, Writable> e: values.entrySet()) {
            HStoreKey key = (HStoreKey) e.getKey();
            if (key.getColumn().equals(COL_REGIONINFO)) {
              info = (HRegionInfo) Writables.getWritable(
                    ((ImmutableBytesWritable) e.getValue()).get(), info);

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          server.openScanner(firstMetaServer.getRegionInfo().getRegionName(),
            COL_REGIONINFO_ARRAY, tableName, System.currentTimeMillis(), null);
        
        boolean disabled = false;
        while (true) {
          HbaseMapWritable values = server.next(scannerId);
          if (values == null || values.size() == 0) {
            if (valuesfound == 0) {
              throw new NoSuchElementException("table " + tableName + " not found");
            }
            break;
          }
          valuesfound += 1;
          for (Map.Entry<Writable, Writable> e: values.entrySet()) {
            HStoreKey key = (HStoreKey) e.getKey();
            if (key.getColumn().equals(COL_REGIONINFO)) {
              info = (HRegionInfo) Writables.getWritable(
                    ((ImmutableBytesWritable) e.getValue()).get(), info);

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                server.openScanner(m.getRegionName(), COLUMN_FAMILY_ARRAY,
                    tableName, System.currentTimeMillis(), null);


              try {
                while (true) {
                  HbaseMapWritable values = server.next(scannerId);
                  if(values == null || values.size() == 0) {
                    break;
                  }
                  RowMap rm = toRowMap(values);
                  SortedMap<Text, byte[]> map = rm.getMap();
                  HRegionInfo info = getHRegionInfo(map);

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          regionServer.openScanner(region.getRegionName(), COLUMN_FAMILY_ARRAY,
              EMPTY_START_ROW, HConstants.LATEST_TIMESTAMP, null);


        int numberOfRegionsFound = 0;
        while (true) {
          HbaseMapWritable values = regionServer.next(scannerId);
          if (values == null || values.size() == 0) {
            break;
          }


          // TODO: Why does this have to be a sorted map?
          RowMap m = toRowMap(values);

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      List<ToDoEntry> toDoList = new ArrayList<ToDoEntry>();
      Set<HRegionInfo> regions = new HashSet<HRegionInfo>();
      List<Text> emptyRows = new ArrayList<Text>();
      try {
        while (true) {
          HbaseMapWritable values = null;
          try {
            values = server.next(scannerId);
          } catch (IOException e) {
            LOG.error("Shutdown scanning of meta region",
              RemoteExceptionHandler.checkIOException(e));
            break;
          }
          if (values == null || values.size() == 0) {
            break;
          }
          // TODO: Why does this have to be a sorted map?
          RowMap rm = toRowMap(values);
          Text row = rm.getRow();

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                    tableName, HConstants.LATEST_TIMESTAMP, null);


              List<Text> emptyRows = new ArrayList<Text>();
              try {
                while (true) {
                  HbaseMapWritable values = server.next(scannerId);
                  if(values == null || values.size() == 0) {
                    break;
                  }
                  RowMap rm = toRowMap(values);
                  SortedMap<Text, byte[]> map = rm.getMap();
                  Text row = rm.getRow();

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  /**
   * @return Subset of configuration to pass initializing regionservers: e.g.
   * the filesystem to use and root directory to use.
   */
  protected HbaseMapWritable createConfigurationSubset() {
    HbaseMapWritable mw = addConfig(new HbaseMapWritable(), HConstants.HBASE_DIR);
    return addConfig(mw, "fs.default.name");
  }

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org.apache.hadoop.hbase.HMaster$ProcessServerShutdown

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