apache thrift 入门（一）

apache文章/教程1年前 (2023)发布勤奋小助
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1.简介
　　Apache Thrift软件框架，是用来开发可扩展的跨语言的软件服务。通过软件堆栈和代码生成引擎相结合的方式来构建服务，使C++, Java, Python, PHP, Ruby, Erlang, Perl, Haskell, C#, Cocoa, JavaScript, Node.js, Smalltalk, OCaml 、Delphi 等语言之间的工作变得高效且无缝。
　　以上是官网的简介，首先Thrift 是一种服务之间RPC（Remote Procedure Call）协议通信，也就是远程调用。其次，它提供一种代码生成引擎，可以根据模板来生成不同语言的接口代码，这个代码文件里面就包括包括和服务端之间通讯的所有代码，我们就可以不写这些底层的代码啦。
　生成后的代码长这样：
  1 /**
  2  * Autogenerated by Thrift Compiler (0.11.0)
  3  *
  4  * DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
  5  *  @generated
  6  */
  7 package com.thrift.demo;
  8 
  9 @SuppressWarnings({"cast", "rawtypes", "serial", "unchecked", "unused"})
 10 @javax.annotation.Generated(value = "Autogenerated by Thrift Compiler (0.11.0)", date = "2019-06-13")
 11 public class HelloWorldService {
 12 
 13   public interface Iface {
 14 
 15     public java.lang.String sayHello(java.lang.String name) throws org.apache.thrift.TException;
 16 
 17   }
 18 
 19   public interface AsyncIface {
 20 
 21     public void sayHello(java.lang.String name, org.apache.thrift.async.AsyncMethodCallback<java.lang.String> resultHandler) throws org.apache.thrift.TException;
 22 
 23   }
 24 
 25   public static class Client extends org.apache.thrift.TServiceClient implements Iface {
 26     public static class Factory implements org.apache.thrift.TServiceClientFactory<Client> {
 27       public Factory() {}
 28       public Client getClient(org.apache.thrift.protocol.TProtocol prot) {
 29         return new Client(prot);
 30       }
 31       public Client getClient(org.apache.thrift.protocol.TProtocol iprot, org.apache.thrift.protocol.TProtocol oprot) {
 32         return new Client(iprot, oprot);
 33       }
 34     }
 35 
 36     public Client(org.apache.thrift.protocol.TProtocol prot)
 37     {
 38       super(prot, prot);
 39     }
 40 
 41     public Client(org.apache.thrift.protocol.TProtocol iprot, org.apache.thrift.protocol.TProtocol oprot) {
 42       super(iprot, oprot);
 43     }
 44 
 45     public java.lang.String sayHello(java.lang.String name) throws org.apache.thrift.TException
 46     {
 47       send_sayHello(name);
 48       return recv_sayHello();
 49     }
 50 
 51     public void send_sayHello(java.lang.String name) throws org.apache.thrift.TException
 52     {
 53       sayHello_args args = new sayHello_args();
 54       args.setName(name);
 55       sendBase("sayHello", args);
 56     }
 57 
 58     public java.lang.String recv_sayHello() throws org.apache.thrift.TException
 59     {
 60       sayHello_result result = new sayHello_result();
 61       receiveBase(result, "sayHello");
 62       if (result.isSetSuccess()) {
 63         return result.success;
 64       }
 65       throw new org.apache.thrift.TApplicationException(org.apache.thrift.TApplicationException.MISSING_RESULT, "sayHello failed: unknown result");
 66     }
 67 
 68   }
 69   public static class AsyncClient extends org.apache.thrift.async.TAsyncClient implements AsyncIface {
 70     public static class Factory implements org.apache.thrift.async.TAsyncClientFactory<AsyncClient> {
 71       private org.apache.thrift.async.TAsyncClientManager clientManager;
 72       private org.apache.thrift.protocol.TProtocolFactory protocolFactory;
 73       public Factory(org.apache.thrift.async.TAsyncClientManager clientManager, org.apache.thrift.protocol.TProtocolFactory protocolFactory) {
 74         this.clientManager = clientManager;
 75         this.protocolFactory = protocolFactory;
 76       }
 77       public AsyncClient getAsyncClient(org.apache.thrift.transport.TNonblockingTransport transport) {
 78         return new AsyncClient(protocolFactory, clientManager, transport);
 79       }
 80     }
 81 
 82     public AsyncClient(org.apache.thrift.protocol.TProtocolFactory protocolFactory, org.apache.thrift.async.TAsyncClientManager clientManager, org.apache.thrift.transport.TNonblockingTransport transport) {
 83       super(protocolFactory, clientManager, transport);
 84     }
 85 
 86     public void sayHello(java.lang.String name, org.apache.thrift.async.AsyncMethodCallback<java.lang.String> resultHandler) throws org.apache.thrift.TException {
 87       checkReady();
 88       sayHello_call method_call = new sayHello_call(name, resultHandler, this, ___protocolFactory, ___transport);
 89       this.___currentMethod = method_call;
 90       ___manager.call(method_call);
 91     }
 92 
 93     public static class sayHello_call extends org.apache.thrift.async.TAsyncMethodCall<java.lang.String> {
 94       private java.lang.String name;
 95       public sayHello_call(java.lang.String name, org.apache.thrift.async.AsyncMethodCallback<java.lang.String> resultHandler, org.apache.thrift.async.TAsyncClient client, org.apache.thrift.protocol.TProtocolFactory protocolFactory, org.apache.thrift.transport.TNonblockingTransport transport) throws org.apache.thrift.TException {
 96         super(client, protocolFactory, transport, resultHandler, false);
 97         this.name = name;
 98       }
 99 
100       public void write_args(org.apache.thrift.protocol.TProtocol prot) throws org.apache.thrift.TException {
101         prot.writeMessageBegin(new org.apache.thrift.protocol.TMessage("sayHello", org.apache.thrift.protocol.TMessageType.CALL, 0));
102         sayHello_args args = new sayHello_args();
103         args.setName(name);
104         args.write(prot);
105         prot.writeMessageEnd();
106       }
107 
108       public java.lang.String getResult() throws org.apache.thrift.TException {
109         if (getState() != org.apache.thrift.async.TAsyncMethodCall.State.RESPONSE_READ) {
110           throw new java.lang.IllegalStateException("Method call not finished!");
111         }
112         org.apache.thrift.transport.TMemoryInputTransport memoryTransport = new org.apache.thrift.transport.TMemoryInputTransport(getFrameBuffer().array());
113         org.apache.thrift.protocol.TProtocol prot = client.getProtocolFactory().getProtocol(memoryTransport);
114         return (new Client(prot)).recv_sayHello();
115       }
116     }
117 
118   }
119 
120   public static class Processor<I extends Iface> extends org.apache.thrift.TBaseProcessor<I> implements org.apache.thrift.TProcessor {
121     private static final org.slf4j.Logger _LOGGER = org.slf4j.LoggerFactory.getLogger(Processor.class.getName());
122     public Processor(I iface) {
123       super(iface, getProcessMap(new java.util.HashMap<java.lang.String, org.apache.thrift.ProcessFunction<I, ? extends org.apache.thrift.TBase>>()));
124     }
125 
126     protected Processor(I iface, java.util.Map<java.lang.String, org.apache.thrift.ProcessFunction<I, ? extends org.apache.thrift.TBase>> processMap) {
127       super(iface, getProcessMap(processMap));
128     }
129 
130     private static <I extends Iface> java.util.Map<java.lang.String,  org.apache.thrift.ProcessFunction<I, ? extends org.apache.thrift.TBase>> getProcessMap(java.util.Map<java.lang.String, org.apache.thrift.ProcessFunction<I, ? extends  org.apache.thrift.TBase>> processMap) {
131       processMap.put("sayHello", new sayHello());
132       return processMap;
133     }
134 
135     public static class sayHello<I extends Iface> extends org.apache.thrift.ProcessFunction<I, sayHello_args> {
136       public sayHello() {
137         super("sayHello");
138       }
139 
140       public sayHello_args getEmptyArgsInstance() {
141         return new sayHello_args();
142       }
143 
144       protected boolean isOneway() {
145         return false;
146       }
147 
148       @Override
149       protected boolean handleRuntimeExceptions() {
150         return false;
151       }
152 
153       public sayHello_result getResult(I iface, sayHello_args args) throws org.apache.thrift.TException {
154         sayHello_result result = new sayHello_result();
155         result.success = iface.sayHello(args.name);
156         return result;
157       }
158     }
159 
160   }
161 
162   public static class AsyncProcessor<I extends AsyncIface> extends org.apache.thrift.TBaseAsyncProcessor<I> {
163     private static final org.slf4j.Logger _LOGGER = org.slf4j.LoggerFactory.getLogger(AsyncProcessor.class.getName());
164     public AsyncProcessor(I iface) {
165       super(iface, getProcessMap(new java.util.HashMap<java.lang.String, org.apache.thrift.AsyncProcessFunction<I, ? extends org.apache.thrift.TBase, ?>>()));
166     }
167 
168     protected AsyncProcessor(I iface, java.util.Map<java.lang.String,  org.apache.thrift.AsyncProcessFunction<I, ? extends  org.apache.thrift.TBase, ?>> processMap) {
169       super(iface, getProcessMap(processMap));
170     }
171 
172     private static <I extends AsyncIface> java.util.Map<java.lang.String,  org.apache.thrift.AsyncProcessFunction<I, ? extends  org.apache.thrift.TBase,?>> getProcessMap(java.util.Map<java.lang.String,  org.apache.thrift.AsyncProcessFunction<I, ? extends  org.apache.thrift.TBase, ?>> processMap) {
173       processMap.put("sayHello", new sayHello());
174       return processMap;
175     }
176 
177     public static class sayHello<I extends AsyncIface> extends org.apache.thrift.AsyncProcessFunction<I, sayHello_args, java.lang.String> {
178       public sayHello() {
179         super("sayHello");
180       }
181 
182       public sayHello_args getEmptyArgsInstance() {
183         return new sayHello_args();
184       }
185 
186       public org.apache.thrift.async.AsyncMethodCallback<java.lang.String> getResultHandler(final org.apache.thrift.server.AbstractNonblockingServer.AsyncFrameBuffer fb, final int seqid) {
187         final org.apache.thrift.AsyncProcessFunction fcall = this;
188         return new org.apache.thrift.async.AsyncMethodCallback<java.lang.String>() { 
189           public void onComplete(java.lang.String o) {
190             sayHello_result result = new sayHello_result();
191             result.success = o;
192             try {
193               fcall.sendResponse(fb, result, org.apache.thrift.protocol.TMessageType.REPLY,seqid);
194             } catch (org.apache.thrift.transport.TTransportException e) {
195               _LOGGER.error("TTransportException writing to internal frame buffer", e);
196               fb.close();
197             } catch (java.lang.Exception e) {
198               _LOGGER.error("Exception writing to internal frame buffer", e);
199               onError(e);
200             }
201           }
202           public void onError(java.lang.Exception e) {
203             byte msgType = org.apache.thrift.protocol.TMessageType.REPLY;
204             org.apache.thrift.TSerializable msg;
205             sayHello_result result = new sayHello_result();
206             if (e instanceof org.apache.thrift.transport.TTransportException) {
207               _LOGGER.error("TTransportException inside handler", e);
208               fb.close();
209               return;
210             } else if (e instanceof org.apache.thrift.TApplicationException) {
211               _LOGGER.error("TApplicationException inside handler", e);
212               msgType = org.apache.thrift.protocol.TMessageType.EXCEPTION;
213               msg = (org.apache.thrift.TApplicationException)e;
214             } else {
215               _LOGGER.error("Exception inside handler", e);
216               msgType = org.apache.thrift.protocol.TMessageType.EXCEPTION;
217               msg = new org.apache.thrift.TApplicationException(org.apache.thrift.TApplicationException.INTERNAL_ERROR, e.getMessage());
218             }
219             try {
220               fcall.sendResponse(fb,msg,msgType,seqid);
221             } catch (java.lang.Exception ex) {
222               _LOGGER.error("Exception writing to internal frame buffer", ex);
223               fb.close();
224             }
225           }
226         };
227       }
228 
229       protected boolean isOneway() {
230         return false;
231       }
232 
233       public void start(I iface, sayHello_args args, org.apache.thrift.async.AsyncMethodCallback<java.lang.String> resultHandler) throws org.apache.thrift.TException {
234         iface.sayHello(args.name,resultHandler);
235       }
236     }
237 
238   }
239 
240   public static class sayHello_args implements org.apache.thrift.TBase<sayHello_args, sayHello_args._Fields>, java.io.Serializable, Cloneable, Comparable<sayHello_args>   {
241     private static final org.apache.thrift.protocol.TStruct STRUCT_DESC = new org.apache.thrift.protocol.TStruct("sayHello_args");
242 
243     private static final org.apache.thrift.protocol.TField NAME_FIELD_DESC = new org.apache.thrift.protocol.TField("name", org.apache.thrift.protocol.TType.STRING, (short)1);
244 
245     private static final org.apache.thrift.scheme.SchemeFactory STANDARD_SCHEME_FACTORY = new sayHello_argsStandardSchemeFactory();
246     private static final org.apache.thrift.scheme.SchemeFactory TUPLE_SCHEME_FACTORY = new sayHello_argsTupleSchemeFactory();
247 
248     public java.lang.String name; // required
249 
250     /** The set of fields this struct contains, along with convenience methods for finding and manipulating them. */
251     public enum _Fields implements org.apache.thrift.TFieldIdEnum {
252       NAME((short)1, "name");
253 
254       private static final java.util.Map<java.lang.String, _Fields> byName = new java.util.HashMap<java.lang.String, _Fields>();
255 
256       static {
257         for (_Fields field : java.util.EnumSet.allOf(_Fields.class)) {
258           byName.put(field.getFieldName(), field);
259         }
260       }
261 
262       /**
263        * Find the _Fields constant that matches fieldId, or null if its not found.
264        */
265       public static _Fields findByThriftId(int fieldId) {
266         switch(fieldId) {
267           case 1: // NAME
268             return NAME;
269           default:
270             return null;
271         }
272       }
273 
274       /**
275        * Find the _Fields constant that matches fieldId, throwing an exception
276        * if it is not found.
277        */
278       public static _Fields findByThriftIdOrThrow(int fieldId) {
279         _Fields fields = findByThriftId(fieldId);
280         if (fields == null) throw new java.lang.IllegalArgumentException("Field " + fieldId + " doesn't exist!");
281         return fields;
282       }
283 
284       /**
285        * Find the _Fields constant that matches name, or null if its not found.
286        */
287       public static _Fields findByName(java.lang.String name) {
288         return byName.get(name);
289       }
290 
291       private final short _thriftId;
292       private final java.lang.String _fieldName;
293 
294       _Fields(short thriftId, java.lang.String fieldName) {
295         _thriftId = thriftId;
296         _fieldName = fieldName;
297       }
298 
299       public short getThriftFieldId() {
300         return _thriftId;
301       }
302 
303       public java.lang.String getFieldName() {
304         return _fieldName;
305       }
306     }
307 
308     // isset id assignments
309     public static final java.util.Map<_Fields, org.apache.thrift.meta_data.FieldMetaData> metaDataMap;
310     static {
311       java.util.Map<_Fields, org.apache.thrift.meta_data.FieldMetaData> tmpMap = new java.util.EnumMap<_Fields, org.apache.thrift.meta_data.FieldMetaData>(_Fields.class);
312       tmpMap.put(_Fields.NAME, new org.apache.thrift.meta_data.FieldMetaData("name", org.apache.thrift.TFieldRequirementType.DEFAULT, 
313           new org.apache.thrift.meta_data.FieldValueMetaData(org.apache.thrift.protocol.TType.STRING)));
314       metaDataMap = java.util.Collections.unmodifiableMap(tmpMap);
315       org.apache.thrift.meta_data.FieldMetaData.addStructMetaDataMap(sayHello_args.class, metaDataMap);
316     }
317 
318     public sayHello_args() {
319     }
320 
321     public sayHello_args(
322       java.lang.String name)
323     {
324       this();
325       this.name = name;
326     }
327 
328     /**
329      * Performs a deep copy on <i>other</i>.
330      */
331     public sayHello_args(sayHello_args other) {
332       if (other.isSetName()) {
333         this.name = other.name;
334       }
335     }
336 
337     public sayHello_args deepCopy() {
338       return new sayHello_args(this);
339     }
340 
341     @Override
342     public void clear() {
343       this.name = null;
344     }
345 
346     public java.lang.String getName() {
347       return this.name;
348     }
349 
350     public sayHello_args setName(java.lang.String name) {
351       this.name = name;
352       return this;
353     }
354 
355     public void unsetName() {
356       this.name = null;
357     }
358 
359     /** Returns true if field name is set (has been assigned a value) and false otherwise */
360     public boolean isSetName() {
361       return this.name != null;
362     }
363 
364     public void setNameIsSet(boolean value) {
365       if (!value) {
366         this.name = null;
367       }
368     }
369 
370     public void setFieldValue(_Fields field, java.lang.Object value) {
371       switch (field) {
372       case NAME:
373         if (value == null) {
374           unsetName();
375         } else {
376           setName((java.lang.String)value);
377         }
378         break;
379 
380       }
381     }
382 
383     public java.lang.Object getFieldValue(_Fields field) {
384       switch (field) {
385       case NAME:
386         return getName();
387 
388       }
389       throw new java.lang.IllegalStateException();
390     }
391 
392     /** Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise */
393     public boolean isSet(_Fields field) {
394       if (field == null) {
395         throw new java.lang.IllegalArgumentException();
396       }
397 
398       switch (field) {
399       case NAME:
400         return isSetName();
401       }
402       throw new java.lang.IllegalStateException();
403     }
404 
405     @Override
406     public boolean equals(java.lang.Object that) {
407       if (that == null)
408         return false;
409       if (that instanceof sayHello_args)
410         return this.equals((sayHello_args)that);
411       return false;
412     }
413 
414     public boolean equals(sayHello_args that) {
415       if (that == null)
416         return false;
417       if (this == that)
418         return true;
419 
420       boolean this_present_name = true && this.isSetName();
421       boolean that_present_name = true && that.isSetName();
422       if (this_present_name || that_present_name) {
423         if (!(this_present_name && that_present_name))
424           return false;
425         if (!this.name.equals(that.name))
426           return false;
427       }
428 
429       return true;
430     }
431 
432     @Override
433     public int hashCode() {
434       int hashCode = 1;
435 
436       hashCode = hashCode * 8191 + ((isSetName()) ? 131071 : 524287);
437       if (isSetName())
438         hashCode = hashCode * 8191 + name.hashCode();
439 
440       return hashCode;
441     }
442 
443     @Override
444     public int compareTo(sayHello_args other) {
445       if (!getClass().equals(other.getClass())) {
446         return getClass().getName().compareTo(other.getClass().getName());
447       }
448 
449       int lastComparison = 0;
450 
451       lastComparison = java.lang.Boolean.valueOf(isSetName()).compareTo(other.isSetName());
452       if (lastComparison != 0) {
453         return lastComparison;
454       }
455       if (isSetName()) {
456         lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.name, other.name);
457         if (lastComparison != 0) {
458           return lastComparison;
459         }
460       }
461       return 0;
462     }
463 
464     public _Fields fieldForId(int fieldId) {
465       return _Fields.findByThriftId(fieldId);
466     }
467 
468     public void read(org.apache.thrift.protocol.TProtocol iprot) throws org.apache.thrift.TException {
469       scheme(iprot).read(iprot, this);
470     }
471 
472     public void write(org.apache.thrift.protocol.TProtocol oprot) throws org.apache.thrift.TException {
473       scheme(oprot).write(oprot, this);
474     }
475 
476     @Override
477     public java.lang.String toString() {
478       java.lang.StringBuilder sb = new java.lang.StringBuilder("sayHello_args(");
479       boolean first = true;
480 
481       sb.append("name:");
482       if (this.name == null) {
483         sb.append("null");
484       } else {
485         sb.append(this.name);
486       }
487       first = false;
488       sb.append(")");
489       return sb.toString();
490     }
491 
492     public void validate() throws org.apache.thrift.TException {
493       // check for required fields
494       // check for sub-struct validity
495     }
496 
497     private void writeObject(java.io.ObjectOutputStream out) throws java.io.IOException {
498       try {
499         write(new org.apache.thrift.protocol.TCompactProtocol(new org.apache.thrift.transport.TIOStreamTransport(out)));
500       } catch (org.apache.thrift.TException te) {
501         throw new java.io.IOException(te);
502       }
503     }
504 
505     private void readObject(java.io.ObjectInputStream in) throws java.io.IOException, java.lang.ClassNotFoundException {
506       try {
507         read(new org.apache.thrift.protocol.TCompactProtocol(new org.apache.thrift.transport.TIOStreamTransport(in)));
508       } catch (org.apache.thrift.TException te) {
509         throw new java.io.IOException(te);
510       }
511     }
512 
513     private static class sayHello_argsStandardSchemeFactory implements org.apache.thrift.scheme.SchemeFactory {
514       public sayHello_argsStandardScheme getScheme() {
515         return new sayHello_argsStandardScheme();
516       }
517     }
518 
519     private static class sayHello_argsStandardScheme extends org.apache.thrift.scheme.StandardScheme<sayHello_args> {
520 
521       public void read(org.apache.thrift.protocol.TProtocol iprot, sayHello_args struct) throws org.apache.thrift.TException {
522         org.apache.thrift.protocol.TField schemeField;
523         iprot.readStructBegin();
524         while (true)
525         {
526           schemeField = iprot.readFieldBegin();
527           if (schemeField.type == org.apache.thrift.protocol.TType.STOP) { 
528             break;
529           }
530           switch (schemeField.id) {
531             case 1: // NAME
532               if (schemeField.type == org.apache.thrift.protocol.TType.STRING) {
533                 struct.name = iprot.readString();
534                 struct.setNameIsSet(true);
535               } else { 
536                 org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
537               }
538               break;
539             default:
540               org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
541           }
542           iprot.readFieldEnd();
543         }
544         iprot.readStructEnd();
545 
546         // check for required fields of primitive type, which can't be checked in the validate method
547         struct.validate();
548       }
549 
550       public void write(org.apache.thrift.protocol.TProtocol oprot, sayHello_args struct) throws org.apache.thrift.TException {
551         struct.validate();
552 
553         oprot.writeStructBegin(STRUCT_DESC);
554         if (struct.name != null) {
555           oprot.writeFieldBegin(NAME_FIELD_DESC);
556           oprot.writeString(struct.name);
557           oprot.writeFieldEnd();
558         }
559         oprot.writeFieldStop();
560         oprot.writeStructEnd();
561       }
562 
563     }
564 
565     private static class sayHello_argsTupleSchemeFactory implements org.apache.thrift.scheme.SchemeFactory {
566       public sayHello_argsTupleScheme getScheme() {
567         return new sayHello_argsTupleScheme();
568       }
569     }
570 
571     private static class sayHello_argsTupleScheme extends org.apache.thrift.scheme.TupleScheme<sayHello_args> {
572 
573       @Override
574       public void write(org.apache.thrift.protocol.TProtocol prot, sayHello_args struct) throws org.apache.thrift.TException {
575         org.apache.thrift.protocol.TTupleProtocol oprot = (org.apache.thrift.protocol.TTupleProtocol) prot;
576         java.util.BitSet optionals = new java.util.BitSet();
577         if (struct.isSetName()) {
578           optionals.set(0);
579         }
580         oprot.writeBitSet(optionals, 1);
581         if (struct.isSetName()) {
582           oprot.writeString(struct.name);
583         }
584       }
585 
586       @Override
587       public void read(org.apache.thrift.protocol.TProtocol prot, sayHello_args struct) throws org.apache.thrift.TException {
588         org.apache.thrift.protocol.TTupleProtocol iprot = (org.apache.thrift.protocol.TTupleProtocol) prot;
589         java.util.BitSet incoming = iprot.readBitSet(1);
590         if (incoming.get(0)) {
591           struct.name = iprot.readString();
592           struct.setNameIsSet(true);
593         }
594       }
595     }
596 
597     private static <S extends org.apache.thrift.scheme.IScheme> S scheme(org.apache.thrift.protocol.TProtocol proto) {
598       return (org.apache.thrift.scheme.StandardScheme.class.equals(proto.getScheme()) ? STANDARD_SCHEME_FACTORY : TUPLE_SCHEME_FACTORY).getScheme();
599     }
600   }
601 
602   public static class sayHello_result implements org.apache.thrift.TBase<sayHello_result, sayHello_result._Fields>, java.io.Serializable, Cloneable, Comparable<sayHello_result>   {
603     private static final org.apache.thrift.protocol.TStruct STRUCT_DESC = new org.apache.thrift.protocol.TStruct("sayHello_result");
604 
605     private static final org.apache.thrift.protocol.TField SUCCESS_FIELD_DESC = new org.apache.thrift.protocol.TField("success", org.apache.thrift.protocol.TType.STRING, (short)0);
606 
607     private static final org.apache.thrift.scheme.SchemeFactory STANDARD_SCHEME_FACTORY = new sayHello_resultStandardSchemeFactory();
608     private static final org.apache.thrift.scheme.SchemeFactory TUPLE_SCHEME_FACTORY = new sayHello_resultTupleSchemeFactory();
609 
610     public java.lang.String success; // required
611 
612     /** The set of fields this struct contains, along with convenience methods for finding and manipulating them. */
613     public enum _Fields implements org.apache.thrift.TFieldIdEnum {
614       SUCCESS((short)0, "success");
615 
616       private static final java.util.Map<java.lang.String, _Fields> byName = new java.util.HashMap<java.lang.String, _Fields>();
617 
618       static {
619         for (_Fields field : java.util.EnumSet.allOf(_Fields.class)) {
620           byName.put(field.getFieldName(), field);
621         }
622       }
623 
624       /**
625        * Find the _Fields constant that matches fieldId, or null if its not found.
626        */
627       public static _Fields findByThriftId(int fieldId) {
628         switch(fieldId) {
629           case 0: // SUCCESS
630             return SUCCESS;
631           default:
632             return null;
633         }
634       }
635 
636       /**
637        * Find the _Fields constant that matches fieldId, throwing an exception
638        * if it is not found.
639        */
640       public static _Fields findByThriftIdOrThrow(int fieldId) {
641         _Fields fields = findByThriftId(fieldId);
642         if (fields == null) throw new java.lang.IllegalArgumentException("Field " + fieldId + " doesn't exist!");
643         return fields;
644       }
645 
646       /**
647        * Find the _Fields constant that matches name, or null if its not found.
648        */
649       public static _Fields findByName(java.lang.String name) {
650         return byName.get(name);
651       }
652 
653       private final short _thriftId;
654       private final java.lang.String _fieldName;
655 
656       _Fields(short thriftId, java.lang.String fieldName) {
657         _thriftId = thriftId;
658         _fieldName = fieldName;
659       }
660 
661       public short getThriftFieldId() {
662         return _thriftId;
663       }
664 
665       public java.lang.String getFieldName() {
666         return _fieldName;
667       }
668     }
669 
670     // isset id assignments
671     public static final java.util.Map<_Fields, org.apache.thrift.meta_data.FieldMetaData> metaDataMap;
672     static {
673       java.util.Map<_Fields, org.apache.thrift.meta_data.FieldMetaData> tmpMap = new java.util.EnumMap<_Fields, org.apache.thrift.meta_data.FieldMetaData>(_Fields.class);
674       tmpMap.put(_Fields.SUCCESS, new org.apache.thrift.meta_data.FieldMetaData("success", org.apache.thrift.TFieldRequirementType.DEFAULT, 
675           new org.apache.thrift.meta_data.FieldValueMetaData(org.apache.thrift.protocol.TType.STRING)));
676       metaDataMap = java.util.Collections.unmodifiableMap(tmpMap);
677       org.apache.thrift.meta_data.FieldMetaData.addStructMetaDataMap(sayHello_result.class, metaDataMap);
678     }
679 
680     public sayHello_result() {
681     }
682 
683     public sayHello_result(
684       java.lang.String success)
685     {
686       this();
687       this.success = success;
688     }
689 
690     /**
691      * Performs a deep copy on <i>other</i>.
692      */
693     public sayHello_result(sayHello_result other) {
694       if (other.isSetSuccess()) {
695         this.success = other.success;
696       }
697     }
698 
699     public sayHello_result deepCopy() {
700       return new sayHello_result(this);
701     }
702 
703     @Override
704     public void clear() {
705       this.success = null;
706     }
707 
708     public java.lang.String getSuccess() {
709       return this.success;
710     }
711 
712     public sayHello_result setSuccess(java.lang.String success) {
713       this.success = success;
714       return this;
715     }
716 
717     public void unsetSuccess() {
718       this.success = null;
719     }
720 
721     /** Returns true if field success is set (has been assigned a value) and false otherwise */
722     public boolean isSetSuccess() {
723       return this.success != null;
724     }
725 
726     public void setSuccessIsSet(boolean value) {
727       if (!value) {
728         this.success = null;
729       }
730     }
731 
732     public void setFieldValue(_Fields field, java.lang.Object value) {
733       switch (field) {
734       case SUCCESS:
735         if (value == null) {
736           unsetSuccess();
737         } else {
738           setSuccess((java.lang.String)value);
739         }
740         break;
741 
742       }
743     }
744 
745     public java.lang.Object getFieldValue(_Fields field) {
746       switch (field) {
747       case SUCCESS:
748         return getSuccess();
749 
750       }
751       throw new java.lang.IllegalStateException();
752     }
753 
754     /** Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise */
755     public boolean isSet(_Fields field) {
756       if (field == null) {
757         throw new java.lang.IllegalArgumentException();
758       }
759 
760       switch (field) {
761       case SUCCESS:
762         return isSetSuccess();
763       }
764       throw new java.lang.IllegalStateException();
765     }
766 
767     @Override
768     public boolean equals(java.lang.Object that) {
769       if (that == null)
770         return false;
771       if (that instanceof sayHello_result)
772         return this.equals((sayHello_result)that);
773       return false;
774     }
775 
776     public boolean equals(sayHello_result that) {
777       if (that == null)
778         return false;
779       if (this == that)
780         return true;
781 
782       boolean this_present_success = true && this.isSetSuccess();
783       boolean that_present_success = true && that.isSetSuccess();
784       if (this_present_success || that_present_success) {
785         if (!(this_present_success && that_present_success))
786           return false;
787         if (!this.success.equals(that.success))
788           return false;
789       }
790 
791       return true;
792     }
793 
794     @Override
795     public int hashCode() {
796       int hashCode = 1;
797 
798       hashCode = hashCode * 8191 + ((isSetSuccess()) ? 131071 : 524287);
799       if (isSetSuccess())
800         hashCode = hashCode * 8191 + success.hashCode();
801 
802       return hashCode;
803     }
804 
805     @Override
806     public int compareTo(sayHello_result other) {
807       if (!getClass().equals(other.getClass())) {
808         return getClass().getName().compareTo(other.getClass().getName());
809       }
810 
811       int lastComparison = 0;
812 
813       lastComparison = java.lang.Boolean.valueOf(isSetSuccess()).compareTo(other.isSetSuccess());
814       if (lastComparison != 0) {
815         return lastComparison;
816       }
817       if (isSetSuccess()) {
818         lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.success, other.success);
819         if (lastComparison != 0) {
820           return lastComparison;
821         }
822       }
823       return 0;
824     }
825 
826     public _Fields fieldForId(int fieldId) {
827       return _Fields.findByThriftId(fieldId);
828     }
829 
830     public void read(org.apache.thrift.protocol.TProtocol iprot) throws org.apache.thrift.TException {
831       scheme(iprot).read(iprot, this);
832     }
833 
834     public void write(org.apache.thrift.protocol.TProtocol oprot) throws org.apache.thrift.TException {
835       scheme(oprot).write(oprot, this);
836       }
837 
838     @Override
839     public java.lang.String toString() {
840       java.lang.StringBuilder sb = new java.lang.StringBuilder("sayHello_result(");
841       boolean first = true;
842 
843       sb.append("success:");
844       if (this.success == null) {
845         sb.append("null");
846       } else {
847         sb.append(this.success);
848       }
849       first = false;
850       sb.append(")");
851       return sb.toString();
852     }
853 
854     public void validate() throws org.apache.thrift.TException {
855       // check for required fields
856       // check for sub-struct validity
857     }
858 
859     private void writeObject(java.io.ObjectOutputStream out) throws java.io.IOException {
860       try {
861         write(new org.apache.thrift.protocol.TCompactProtocol(new org.apache.thrift.transport.TIOStreamTransport(out)));
862       } catch (org.apache.thrift.TException te) {
863         throw new java.io.IOException(te);
864       }
865     }
866 
867     private void readObject(java.io.ObjectInputStream in) throws java.io.IOException, java.lang.ClassNotFoundException {
868       try {
869         read(new org.apache.thrift.protocol.TCompactProtocol(new org.apache.thrift.transport.TIOStreamTransport(in)));
870       } catch (org.apache.thrift.TException te) {
871         throw new java.io.IOException(te);
872       }
873     }
874 
875     private static class sayHello_resultStandardSchemeFactory implements org.apache.thrift.scheme.SchemeFactory {
876       public sayHello_resultStandardScheme getScheme() {
877         return new sayHello_resultStandardScheme();
878       }
879     }
880 
881     private static class sayHello_resultStandardScheme extends org.apache.thrift.scheme.StandardScheme<sayHello_result> {
882 
883       public void read(org.apache.thrift.protocol.TProtocol iprot, sayHello_result struct) throws org.apache.thrift.TException {
884         org.apache.thrift.protocol.TField schemeField;
885         iprot.readStructBegin();
886         while (true)
887         {
888           schemeField = iprot.readFieldBegin();
889           if (schemeField.type == org.apache.thrift.protocol.TType.STOP) { 
890             break;
891           }
892           switch (schemeField.id) {
893             case 0: // SUCCESS
894               if (schemeField.type == org.apache.thrift.protocol.TType.STRING) {
895                 struct.success = iprot.readString();
896                 struct.setSuccessIsSet(true);
897               } else { 
898                 org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
899               }
900               break;
901             default:
902               org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
903           }
904           iprot.readFieldEnd();
905         }
906         iprot.readStructEnd();
907 
908         // check for required fields of primitive type, which can't be checked in the validate method
909         struct.validate();
910       }
911 
912       public void write(org.apache.thrift.protocol.TProtocol oprot, sayHello_result struct) throws org.apache.thrift.TException {
913         struct.validate();
914 
915         oprot.writeStructBegin(STRUCT_DESC);
916         if (struct.success != null) {
917           oprot.writeFieldBegin(SUCCESS_FIELD_DESC);
918           oprot.writeString(struct.success);
919           oprot.writeFieldEnd();
920         }
921         oprot.writeFieldStop();
922         oprot.writeStructEnd();
923       }
924 
925     }
926 
927     private static class sayHello_resultTupleSchemeFactory implements org.apache.thrift.scheme.SchemeFactory {
928       public sayHello_resultTupleScheme getScheme() {
929         return new sayHello_resultTupleScheme();
930       }
931     }
932 
933     private static class sayHello_resultTupleScheme extends org.apache.thrift.scheme.TupleScheme<sayHello_result> {
934 
935       @Override
936       public void write(org.apache.thrift.protocol.TProtocol prot, sayHello_result struct) throws org.apache.thrift.TException {
937         org.apache.thrift.protocol.TTupleProtocol oprot = (org.apache.thrift.protocol.TTupleProtocol) prot;
938         java.util.BitSet optionals = new java.util.BitSet();
939         if (struct.isSetSuccess()) {
940           optionals.set(0);
941         }
942         oprot.writeBitSet(optionals, 1);
943         if (struct.isSetSuccess()) {
944           oprot.writeString(struct.success);
945         }
946       }
947 
948       @Override
949       public void read(org.apache.thrift.protocol.TProtocol prot, sayHello_result struct) throws org.apache.thrift.TException {
950         org.apache.thrift.protocol.TTupleProtocol iprot = (org.apache.thrift.protocol.TTupleProtocol) prot;
951         java.util.BitSet incoming = iprot.readBitSet(1);
952         if (incoming.get(0)) {
953           struct.success = iprot.readString();
954           struct.setSuccessIsSet(true);
955         }
956       }
957     }
958 
959     private static <S extends org.apache.thrift.scheme.IScheme> S scheme(org.apache.thrift.protocol.TProtocol proto) {
960       return (org.apache.thrift.scheme.StandardScheme.class.equals(proto.getScheme()) ? STANDARD_SCHEME_FACTORY : TUPLE_SCHEME_FACTORY).getScheme();
961     }
962   }
963 
964 }