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 groovy.lang.Writable

   @Deprecated
   public void merge(Template template, BindingContext context) throws Exception
   {
      context.put("_ctx", context);
      context.setGroovyTemplateService(this);
      Writable writable = template.make(context);
      writable.writeTo(context.getWriter());
   }

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Examples of groovy.lang.Writable

            throw new ScriptException("Unable to compile GSP script: " + e.getMessage());
        }


        Bindings bindings = ctx.getBindings(ScriptContext.ENGINE_SCOPE);


        Writable result = template.make(bindings);


        try {
            result.writeTo(ctx.getWriter());
        } catch (IOException e) {
            throw new ScriptException("Unable to write result of script execution: " + e.getMessage());
        }


        return null;

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Examples of net.nutch.io.Writable

    }
    return connection;
  }


  private Writable makeValue() {
    Writable value;                             // construct value
    try {
      value = (Writable)valueClass.newInstance();
    } catch (InstantiationException e) {
      throw new RuntimeException(e.toString());
    } catch (IllegalAccessException e) {

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Examples of org.apache.hadoop.io.Writable


    WebPage page = null;
    inlinkedScoreData.clear();
    
    for (NutchWritable nutchWritable : values) {
      Writable val = nutchWritable.get();
      if (val instanceof WebPageWritable) {
        page = ((WebPageWritable) val).getWebPage();
      } else {
        inlinkedScoreData.add((ScoreDatum) val);
        if (inlinkedScoreData.size() >= maxLinks) {

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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

            //noinspection ThrowableInstanceNeverThrown
            call.setException(new RemoteException(WritableUtils.readString(in),
                WritableUtils.readString(in)));
          }
        } else {
          Writable value = ReflectionUtils.newInstance(valueClass, conf);
          value.readFields(in);                 // read value
          // it's possible that this call may have been cleaned up due to a RPC
          // timeout, so check if it still exists before setting the value.
          if (call != null) {
            call.setValue(value);
          }

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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 = (Writable)ReflectionUtils.newInstance(paramClass, conf);           // read param
      param.readFields(dis);        
        
      Call call = new Call(id, param, this);
      synchronized (callQueue) {
        if (callQueue.size() >= maxQueueSize) {
          Call oldCall = callQueue.removeFirst();

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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);
          UserGroupInformation previous = UserGroupInformation.getCurrentUGI();
          UserGroupInformation.setCurrentUGI(call.connection.ticket);
          try {
            value = call(call.param, call.receivedTime);             // make the call
          } catch (Throwable e) {
            LOG.info(getName()+", call "+call+": error: " + e, e);
            errorClass = e.getClass().getName();
            error = StringUtils.stringifyException(e);
          }
          UserGroupInformation.setCurrentUGI(previous);
          CurCall.set(null);


          buf.reset();
          DataOutputStream out = new DataOutputStream(buf);
          out.writeInt(call.id);                // write call id
          out.writeBoolean(error != null);      // write error flag


          if (error == null) {
            value.write(out);
          } else {
            WritableUtils.writeString(out, errorClass);
            WritableUtils.writeString(out, error);
          }
          call.setResponse(ByteBuffer.wrap(buf.toByteArray()));

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Examples of org.apache.hadoop.io.Writable

        reporter.progress();
      }
    }
    
    private void spill(RawKeyValueIterator resultIter) throws IOException {
      Writable key = null;
      Writable value = null;


      try {
        // indicate progress, since constructor may take a while (because of 
        // user code) 
        reporter.progress();
        key = (WritableComparable)ReflectionUtils.newInstance(keyClass, job);
        value = (Writable)ReflectionUtils.newInstance(valClass, job);
      } catch (Exception e) {
        throw new RuntimeException(e);
      }


      DataInputBuffer keyIn = new DataInputBuffer();
      DataInputBuffer valIn = new DataInputBuffer();
      DataOutputBuffer valOut = new DataOutputBuffer();
      while (resultIter.next()) {
        keyIn.reset(resultIter.getKey().getData(), 
                    resultIter.getKey().getLength());
        key.readFields(keyIn);
        valOut.reset();
        (resultIter.getValue()).writeUncompressedBytes(valOut);
        valIn.reset(valOut.getData(), valOut.getLength());
        value.readFields(valIn);
        writer.append(key, value);
        reporter.progress();
      }
    }

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Examples of org.apache.hadoop.io.Writable

        int entries = in.readInt();


        // Then read each key/value pair


        for (int i = 0; i < entries; i++) {
            Writable key = (Writable) ReflectionUtils.newInstance(getClass(in.readByte()), getConf());


            key.readFields(in);


            Writable value = (Writable) ReflectionUtils.newInstance(getClass(in.readByte()), getConf());


            value.readFields(in);
            instance.put(key, value);
        }
    }

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