Examples of Writable

groovy.lang.Writable

Represents an object which is capable of writing itself to a text stream in a more efficient format than just creating a toString() representation of itself. This mechanism is particularly useful for templates and such like.

It is worth noting that writable implementations often override their toString() implementation as well to allow rendering the same result directly to a String; however this is not required.
@author James Strachan @version $Revision: 18909 $
net.nutch.io.Writable
A simple, efficient, serialization protocol, based on {@link DataInput} and{@link DataOutput}.
Implementations typically implement a static read(DataInput) method which constructs a new instance, calls {@link #readFields(DataInput)}, and returns the instance. @author Doug Cutting
org.apache.hadoop.io.Writable
A simple, efficient, serialization protocol, based on {@link DataInput} and{@link DataOutput}.
Implementations typically implement a static read(DataInput) method which constructs a new instance, calls {@link #readFields(DataInput)}, and returns the instance.
org.apache.nutch.io.Writable
A simple, efficient, serialization protocol, based on {@link DataInput} and{@link DataOutput}.
Implementations typically implement a static read(DataInput) method which constructs a new instance, calls {@link #readFields(DataInput)}, and returns the instance. @author Doug Cutting
org.jakstab.rtl.expressions.Writable
An interface for expressions that can be the left hand side of an assignment. @author Johannes Kinder

Examples of org.apache.hadoop.io.Writable

          if (isError) {
            UTF8 utf8 = new UTF8();
            utf8.readFields(in);                  // read error string
            call.setResult(null, utf8.toString());
          } else {
            Writable value = makeValue();
            try {
              readingCall = call;
              if(value instanceof Configurable) {
                ((Configurable) value).setConf(conf);
              }
              value.readFields(in);                 // read value
            } finally {
              readingCall = null;
            }
            call.setResult(value, null);
          }

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Examples of org.apache.hadoop.io.Writable


        Call call = calls.get(id);


        int state = in.readInt();     // read call status
        if (state == Status.SUCCESS.state) {
          Writable value = ReflectionUtils.newInstance(valueClass, conf);
          value.readFields(in);                 // read value
          call.setValue(value);
          calls.remove(id);
        } else if (state == Status.ERROR.state) {
          call.setException(new RemoteException(WritableUtils.readString(in),
                                                WritableUtils.readString(in)));

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Examples of org.apache.hadoop.io.Writable

    
    // Read the data back and check
    LOG.info("Reading from the SequenceFile...");
    SequenceFile.Reader reader = new SequenceFile.Reader(fs, filePath, conf);
    
    Writable key = (Writable)reader.getKeyClass().newInstance();
    Writable value = (Writable)reader.getValueClass().newInstance();
    
    int lc = 0;
    try {
      while (reader.next(key, value)) {
        assertEquals("key" + lc, key.toString());
        assertEquals("value" + lc, value.toString());
        lc ++;
      }
    } finally {
      reader.close();
    }

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Examples of org.apache.hadoop.io.Writable

      int id = dis.readInt();                    // try to read an id
        
      if (LOG.isDebugEnabled())
        LOG.debug(" got #" + id);


      Writable param = ReflectionUtils.newInstance(paramClass, conf);//read param
      param.readFields(dis);        
        
      Call call = new Call(id, param, this);
      callQueue.put(call);              // queue the call; maybe blocked here
      incRpcCount();  // Increment the rpc count
    }

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Examples of org.apache.hadoop.io.Writable

            LOG.debug(getName() + ": has #" + call.id + " from " +
                      call.connection);
          
          String errorClass = null;
          String error = null;
          Writable value = null;


          CurCall.set(call);
          try {
            // Make the call as the user via Subject.doAs, thus associating
            // the call with the Subject

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Examples of org.apache.hadoop.io.Writable

        MockResult<ExSummarized> result = MockResult.create();
        Rendezvous<Writable> object = createRendezvous(
                loader,
                name.getQualifiedName(),
                result);
        Writable key = (Writable) create(loader, shuffle.getCompiled().getKeyTypeName());
        Writable value = (Writable) create(loader, shuffle.getCompiled().getValueTypeName());


        Ex1 orig = new Ex1();
        orig.setValueOption(new IntOption().modify(100));
        ExSummarized model = new ExSummarized();
        model.setValue(100);

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Examples of org.apache.hadoop.io.Writable

    protected void reduce(
            SortableSlot key,
            Iterable<WritableSlot> values,
            Context context) throws IOException, InterruptedException {
        int slot = key.getSlot();
        Writable cache = objects[slot];
        Result<Writable> result = results[slot];
        for (WritableSlot holder : values) {
            holder.loadTo(cache);
            result.add(cache);
        }

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Examples of org.apache.hadoop.io.Writable

        object.set("type_decimal", new BigDecimal("1234.567"));
        object.set("type_text", new Text("Hello, world!"));
        object.set("type_date", new Date(2011, 3, 31));
        object.set("type_datetime", new DateTime(2011, 3, 31, 23, 30, 1));


        Writable writable = (Writable) object.unwrap();


        DataOutputBuffer output = new DataOutputBuffer();
        writable.write(output);


        Writable copy = (Writable) loader.newModel("Primitives").unwrap();
        DataInputBuffer input = new DataInputBuffer();
        input.reset(output.getData(), output.getLength());
        copy.readFields(input);


        assertThat(input.read(), is(-1));
        assertThat(writable, equalTo(copy));
    }

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Examples of org.apache.hadoop.io.Writable

    @SuppressWarnings("unchecked")
    private <T extends Writable> T restoreWritable(T value) {
        try {
            ByteArrayInputStream read = new ByteArrayInputStream(toBytes(value));
            DataInputStream in = new DataInputStream(read);
            Writable copy = value.getClass().newInstance();
            copy.readFields(in);
            assertThat(in.read(), is(-1));
            assertThat(copy, is((Writable) value));
            assertThat(copy.hashCode(), is(value.hashCode()));
            return (T) copy;
        } catch (Exception e) {
            throw new AssertionError(e);
        }
    }

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Examples of org.apache.hadoop.io.Writable

        try {
            ps = conn.prepareStatement(sql);
            rs = ps.executeQuery();
            actual.clear();
            while (rs.next()) {
                Writable model;
                try {
                    model = getModelFromResultSet(rs);
                    actual.add(model);
                } catch (InstantiationException e) {
                    throw new RuntimeException(e);

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