diff --git a/lib/cpp/Makefile.am b/lib/cpp/Makefile.am
index e0c69e9..88da56a 100644
--- a/lib/cpp/Makefile.am
+++ b/lib/cpp/Makefile.am
@@ -13,6 +13,7 @@
                     src/concurrency/TimerManager.cpp \
                     src/processor/PeekProcessor.cpp \
                     src/protocol/TBinaryProtocol.cpp \
+                    src/protocol/TDebugProtocol.cpp \
                     src/transport/TFileTransport.cpp \
                     src/transport/THttpClient.cpp \
                     src/transport/TSocket.cpp \
@@ -55,6 +56,8 @@
 include_protocoldir = $(include_thriftdir)/protocol
 include_protocol_HEADERS = \
                          src/protocol/TBinaryProtocol.h \
+                         src/protocol/TDebugProtocol.h \
+                         src/protocol/TOneWayProtocol.h \
                          src/protocol/TProtocolException.h \
                          src/protocol/TProtocol.h
 
diff --git a/lib/cpp/src/protocol/TDebugProtocol.cpp b/lib/cpp/src/protocol/TDebugProtocol.cpp
new file mode 100644
index 0000000..5d28b78
--- /dev/null
+++ b/lib/cpp/src/protocol/TDebugProtocol.cpp
@@ -0,0 +1,315 @@
+// Copyright (c) 2006- Facebook
+// Distributed under the Thrift Software License
+//
+// See accompanying file LICENSE or visit the Thrift site at:
+// http://developers.facebook.com/thrift/
+
+#include "TDebugProtocol.h"
+
+#include <cassert>
+#include <cctype>
+#include <cstdio>
+#include <stdexcept>
+#include <boost/static_assert.hpp>
+#include <boost/lexical_cast.hpp>
+
+using std::string;
+
+
+static string byte_to_hex(const uint8_t byte) {
+  char buf[3];
+  int ret = std::sprintf(buf, "%02x", (int)byte);
+  assert(ret == 2);
+  assert(buf[2] == '\0');
+  return buf;
+}
+
+
+namespace facebook { namespace thrift { namespace protocol { 
+
+string TDebugProtocol::fieldTypeName(TType type) {
+  switch (type) {
+    case T_STOP   : return "stop"   ;
+    case T_VOID   : return "void"   ;
+    case T_BOOL   : return "bool"   ;
+    case T_BYTE   : return "byte"   ;
+    case T_I16    : return "i16"    ;
+    case T_I32    : return "i32"    ;
+    case T_U64    : return "u64"    ;
+    case T_I64    : return "i64"    ;
+    case T_DOUBLE : return "double" ;
+    case T_STRING : return "string" ;
+    case T_STRUCT : return "struct" ;
+    case T_MAP    : return "map"    ;
+    case T_SET    : return "set"    ;
+    case T_LIST   : return "list"   ;
+    case T_UTF8   : return "utf8"   ;
+    case T_UTF16  : return "utf16"  ;
+    default: return "unknown";
+  }
+}
+
+void TDebugProtocol::indentUp() {
+  indent_str_ += string(indent_inc, ' ');
+}
+
+void TDebugProtocol::indentDown() {
+  if (indent_str_.length() < (string::size_type)indent_inc) {
+    throw TProtocolException(TProtocolException::INVALID_DATA);
+  }
+  indent_str_.erase(indent_str_.length() - indent_inc);
+}
+
+uint32_t TDebugProtocol::writePlain(const string& str) {
+  trans_->write((uint8_t*)str.data(), str.length());
+  return str.length();
+}
+
+uint32_t TDebugProtocol::writeIndented(const string& str) {
+  trans_->write((uint8_t*)indent_str_.data(), indent_str_.length());
+  trans_->write((uint8_t*)str.data(), str.length());
+  return indent_str_.length() + str.length();
+}
+
+uint32_t TDebugProtocol::startItem() {
+  uint32_t size;
+
+  switch (write_state_.back()) {
+    case UNINIT:
+      // XXX figure out what to do here.
+      //throw TProtocolException(TProtocolException::INVALID_DATA);
+      //return writeIndented(str);
+      return 0;
+    case STRUCT:
+      return 0;
+    case SET:
+      return writeIndented("");
+    case MAP_KEY:
+      return writeIndented("");
+    case MAP_VALUE:
+      return writePlain(" -> ");
+    case LIST:
+      size = writeIndented(
+          "[" + boost::lexical_cast<string>(list_idx_.back()) + "] = ");
+      list_idx_.back()++;
+      return size;
+    default:
+      throw std::logic_error("Invalid enum value.");
+  }
+}
+
+uint32_t TDebugProtocol::endItem() {
+  //uint32_t size;
+
+  switch (write_state_.back()) {
+    case UNINIT:
+      // XXX figure out what to do here.
+      //throw TProtocolException(TProtocolException::INVALID_DATA);
+      //return writeIndented(str);
+      return 0;
+    case STRUCT:
+      return writePlain(",\n");
+    case SET:
+      return writePlain(",\n");
+    case MAP_KEY:
+      write_state_.back() = MAP_VALUE;
+      return 0;
+    case MAP_VALUE:
+      write_state_.back() = MAP_KEY;
+      return writePlain(",\n");
+    case LIST:
+      return writePlain(",\n");
+    default:
+      throw std::logic_error("Invalid enum value.");
+  }
+}
+
+uint32_t TDebugProtocol::writeItem(const std::string& str) {
+  uint32_t size = 0;
+  size += startItem();
+  size += writePlain(str);
+  size += endItem();
+  return size;
+}
+
+uint32_t TDebugProtocol::writeMessageBegin(const std::string& name,
+                                           const TMessageType messageType,
+                                           const int32_t seqid) {
+  throw TProtocolException(TProtocolException::NOT_IMPLEMENTED,
+      "TDebugProtocol does not support messages (yet).");
+}
+
+uint32_t TDebugProtocol::writeMessageEnd() {
+  throw TProtocolException(TProtocolException::NOT_IMPLEMENTED,
+      "TDebugProtocol does not support messages (yet).");
+}
+
+uint32_t TDebugProtocol::writeStructBegin(const string& name) {
+  uint32_t size = 0;
+  size += startItem();
+  size += writePlain(name + " {\n");
+  indentUp();
+  write_state_.push_back(STRUCT);
+  return size;
+}
+
+uint32_t TDebugProtocol::writeStructEnd() {
+  indentDown();
+  write_state_.pop_back();
+  uint32_t size = 0;
+  size += writeIndented("}");
+  size += endItem();
+  return size;
+}
+
+uint32_t TDebugProtocol::writeFieldBegin(const string& name,
+                                         const TType fieldType,
+                                         const int16_t fieldId) {
+  // sprintf(id_str, "%02d", fieldId);
+  string id_str = boost::lexical_cast<string>(fieldId);
+  if (id_str.length() == 1) id_str = '0' + id_str;
+
+  return writeIndented(
+      id_str + ": " +
+      name + " (" + 
+      fieldTypeName(fieldType) + ") = ");
+}
+
+uint32_t TDebugProtocol::writeFieldEnd() {
+  assert(write_state_.back() == STRUCT);
+  return 0;
+}
+
+uint32_t TDebugProtocol::writeFieldStop() {
+  return 0;
+    //writeIndented("***STOP***\n");
+}  
+                               
+uint32_t TDebugProtocol::writeMapBegin(const TType keyType,
+                                       const TType valType,
+                                       const uint32_t size) {
+  // TODO(dreiss): Optimize short maps?
+  uint32_t bsize = 0;
+  bsize += startItem();
+  bsize += writePlain(
+      "map<" + fieldTypeName(keyType) + "," + fieldTypeName(valType) + ">"
+      "[" + boost::lexical_cast<string>(size) + "] {\n");
+  indentUp();
+  write_state_.push_back(MAP_KEY);
+  return bsize;
+}
+
+uint32_t TDebugProtocol::writeMapEnd() {
+  indentDown();
+  write_state_.pop_back();
+  uint32_t size = 0;
+  size += writeIndented("}");
+  size += endItem();
+  return size;
+}
+
+uint32_t TDebugProtocol::writeListBegin(const TType elemType,
+                                        const uint32_t size) {
+  // TODO(dreiss): Optimize short arrays.
+  uint32_t bsize = 0;
+  bsize += startItem();
+  bsize += writePlain(
+      "list<" + fieldTypeName(elemType) + ">"
+      "[" + boost::lexical_cast<string>(size) + "] {\n");
+  indentUp();
+  write_state_.push_back(LIST);
+  list_idx_.push_back(0);
+  return bsize;
+}
+
+uint32_t TDebugProtocol::writeListEnd() {
+  indentDown();
+  write_state_.pop_back();
+  list_idx_.pop_back();
+  uint32_t size = 0;
+  size += writeIndented("}");
+  size += endItem();
+  return size;
+}
+
+uint32_t TDebugProtocol::writeSetBegin(const TType elemType,
+                                       const uint32_t size) {
+  // TODO(dreiss): Optimize short sets.
+  uint32_t bsize = 0;
+  bsize += startItem();
+  bsize += writePlain(
+      "set<" + fieldTypeName(elemType) + ">"
+      "[" + boost::lexical_cast<string>(size) + "] {\n");
+  indentUp();
+  write_state_.push_back(SET);
+  return bsize;
+}
+
+uint32_t TDebugProtocol::writeSetEnd() {
+  indentDown();
+  write_state_.pop_back();
+  uint32_t size = 0;
+  size += writeIndented("}");
+  size += endItem();
+  return size;
+}
+
+uint32_t TDebugProtocol::writeBool(const bool value) {
+  return writeItem(value ? "true" : "false");
+}
+
+uint32_t TDebugProtocol::writeByte(const int8_t byte) {
+  return writeItem("0x" + byte_to_hex(byte));
+}
+
+uint32_t TDebugProtocol::writeI16(const int16_t i16) {
+  return writeItem(boost::lexical_cast<string>(i16));
+}
+
+uint32_t TDebugProtocol::writeI32(const int32_t i32) {
+  return writeItem(boost::lexical_cast<string>(i32));
+}
+
+uint32_t TDebugProtocol::writeI64(const int64_t i64) {
+  return writeItem(boost::lexical_cast<string>(i64));
+}
+  
+uint32_t TDebugProtocol::writeDouble(const double dub) {
+  return writeItem(boost::lexical_cast<string>(dub));
+}
+
+  
+uint32_t TDebugProtocol::writeString(const string& str) {
+  // XXX Raw/UTF-8?
+
+  string output = "\"";
+
+  for (string::const_iterator it = str.begin(); it != str.end(); ++it) {
+    if (*it == '\\') {
+      output += "\\";
+    } else if (*it == '"') {
+      output += "\\\"";
+    } else if (std::isprint(*it)) {
+      output += *it;
+    } else {
+      switch (*it) {
+        case '\"': output += "\\\""; break;
+        case '\a': output += "\\a"; break;
+        case '\b': output += "\\b"; break;
+        case '\f': output += "\\f"; break;
+        case '\n': output += "\\n"; break;
+        case '\r': output += "\\r"; break;
+        case '\t': output += "\\t"; break;
+        case '\v': output += "\\v"; break;
+        default:
+          output += "\\x";
+          output += byte_to_hex(*it);
+      }
+    }
+  }
+
+  output += '\"';
+  return writeItem(output);
+}
+
+}}} // facebook::thrift::protocol
diff --git a/lib/cpp/src/protocol/TDebugProtocol.h b/lib/cpp/src/protocol/TDebugProtocol.h
new file mode 100644
index 0000000..0dd60d8
--- /dev/null
+++ b/lib/cpp/src/protocol/TDebugProtocol.h
@@ -0,0 +1,194 @@
+// Copyright (c) 2006- Facebook
+// Distributed under the Thrift Software License
+//
+// See accompanying file LICENSE or visit the Thrift site at:
+// http://developers.facebook.com/thrift/
+
+#ifndef _THRIFT_PROTOCOL_TDEBUGPROTOCOL_H_
+#define _THRIFT_PROTOCOL_TDEBUGPROTOCOL_H_ 1
+
+#include "TProtocol.h"
+#include "TOneWayProtocol.h"
+
+#include <boost/shared_ptr.hpp>
+
+#include <transport/TTransportUtils.h>
+
+namespace facebook { namespace thrift { namespace protocol { 
+
+/*
+
+!!! EXPERIMENTAL CODE !!!
+
+This protocol is very much a work in progress.
+It doesn't handle many cases properly.
+It throws exceptions in many cases.
+It probably segfaults in many cases.
+Bug reports and feature requests are welcome.
+Complaints are not. :R
+
+*/
+
+
+/**
+ * Protocol that prints the payload in a nice human-readable format.
+ * Reading from this protocol is not supported.
+ *
+ * @author David Reiss <dreiss@facebook.com>
+ */
+class TDebugProtocol : public TWriteOnlyProtocol {
+ private:
+  enum write_state_t {
+    UNINIT,
+    STRUCT,
+    LIST,
+    SET,
+    MAP_KEY,
+    MAP_VALUE,
+  };
+
+ public:
+  TDebugProtocol(boost::shared_ptr<TTransport> trans)
+    : TWriteOnlyProtocol(trans, "TDebugProtocol")
+  {
+    write_state_.push_back(UNINIT);
+  }
+
+
+  virtual uint32_t writeMessageBegin(const std::string& name,
+                                     const TMessageType messageType,
+                                     const int32_t seqid);
+
+  virtual uint32_t writeMessageEnd();
+
+
+  uint32_t writeStructBegin(const std::string& name);
+
+  uint32_t writeStructEnd();
+
+  uint32_t writeFieldBegin(const std::string& name,
+                           const TType fieldType,
+                           const int16_t fieldId);
+
+  uint32_t writeFieldEnd();
+
+  uint32_t writeFieldStop();
+                                       
+  uint32_t writeMapBegin(const TType keyType,
+                         const TType valType,
+                         const uint32_t size);
+
+  uint32_t writeMapEnd();
+
+  uint32_t writeListBegin(const TType elemType,
+                          const uint32_t size);
+
+  uint32_t writeListEnd();
+
+  uint32_t writeSetBegin(const TType elemType,
+                         const uint32_t size);
+
+  uint32_t writeSetEnd();
+
+  uint32_t writeBool(const bool value);
+
+  uint32_t writeByte(const int8_t byte);
+
+  uint32_t writeI16(const int16_t i16);
+
+  uint32_t writeI32(const int32_t i32);
+
+  uint32_t writeI64(const int64_t i64);
+
+  uint32_t writeDouble(const double dub);
+
+  uint32_t writeString(const std::string& str);
+
+
+ private:
+  void indentUp();
+  void indentDown();
+  uint32_t writePlain(const std::string& str);
+  uint32_t writeIndented(const std::string& str);
+  uint32_t startItem();
+  uint32_t endItem();
+  uint32_t writeItem(const std::string& str);
+
+  static std::string fieldTypeName(TType type);
+
+  std::string indent_str_;
+  static const int indent_inc = 2;
+
+  std::vector<write_state_t> write_state_;
+  std::vector<int> list_idx_;
+};
+
+/**
+ * Constructs debug protocol handlers
+ */
+class TDebugProtocolFactory : public TProtocolFactory {
+ public:
+  TDebugProtocolFactory() {}
+  virtual ~TDebugProtocolFactory() {}
+
+  boost::shared_ptr<TProtocol> getProtocol(boost::shared_ptr<TTransport> trans) {
+    return boost::shared_ptr<TProtocol>(new TDebugProtocol(trans));
+  }
+
+};
+
+}}} // facebook::thrift::protocol
+
+
+namespace facebook { namespace thrift { 
+
+template<typename ThriftStruct>
+std::string ThriftDebugString(const ThriftStruct& ts) {
+  using namespace facebook::thrift::transport;
+  using namespace facebook::thrift::protocol;
+  TMemoryBuffer* buffer = new TMemoryBuffer;
+  boost::shared_ptr<TTransport> trans(buffer);
+  TDebugProtocol protocol(trans);
+
+  ts.write(&protocol);
+
+  uint8_t* buf;
+  uint32_t size;
+  buffer->getBuffer(&buf, &size);
+  return std::string((char*)buf, (unsigned int)size);
+}
+
+// TODO(dreiss): This is badly broken.  Don't use it unless you are me.
+#if 0
+template<typename Object>
+std::string DebugString(const std::vector<Object>& vec) {
+  using namespace facebook::thrift::transport;
+  using namespace facebook::thrift::protocol;
+  TMemoryBuffer* buffer = new TMemoryBuffer;
+  boost::shared_ptr<TTransport> trans(buffer);
+  TDebugProtocol protocol(trans);
+
+  // I am gross!
+  protocol.writeStructBegin("SomeRandomVector");
+
+  // TODO: Fix this with a trait.
+  protocol.writeListBegin((TType)99, vec.size());
+  typename std::vector<Object>::const_iterator it;
+  for (it = vec.begin(); it != vec.end(); ++it) {
+    it->write(&protocol);
+  }
+  protocol.writeListEnd();
+
+  uint8_t* buf;
+  uint32_t size;
+  buffer->getBuffer(&buf, &size);
+  return std::string((char*)buf, (unsigned int)size);
+}
+#endif // 0
+
+}} // facebook::thrift
+
+
+#endif // #ifndef _THRIFT_PROTOCOL_TDEBUGPROTOCOL_H_
+
+
diff --git a/lib/cpp/src/protocol/TOneWayProtocol.h b/lib/cpp/src/protocol/TOneWayProtocol.h
new file mode 100644
index 0000000..c928058
--- /dev/null
+++ b/lib/cpp/src/protocol/TOneWayProtocol.h
@@ -0,0 +1,147 @@
+// Copyright (c) 2006- Facebook
+// Distributed under the Thrift Software License
+//
+// See accompanying file LICENSE or visit the Thrift site at:
+// http://developers.facebook.com/thrift/
+
+#ifndef _THRIFT_PROTOCOL_TONEWAYPROTOCOL_H_
+#define _THRIFT_PROTOCOL_TONEWAYPROTOCOL_H_ 1
+
+#include "TProtocol.h"
+
+namespace facebook { namespace thrift { namespace protocol { 
+
+/**
+ * Abstract class for implementing a protocol that can only be written,
+ * not read.
+ *
+ * @author David Reiss <dreiss@facebook.com>
+ */
+class TWriteOnlyProtocol : public TProtocol {
+ public:
+  /**
+   * @param subclass_name  The name of the concrete subclass.
+   */
+  TWriteOnlyProtocol(boost::shared_ptr<TTransport> trans,
+                     const std::string& subclass_name)
+    : TProtocol(trans)
+    , subclass_(subclass_name)
+  {}
+
+  // All writing functions remain abstract.
+
+  /**
+   * Reading functions all throw an exception.
+   */
+
+  uint32_t readMessageBegin(std::string& name,
+			    TMessageType& messageType,
+			    int32_t& seqid) {
+    throw TProtocolException(TProtocolException::NOT_IMPLEMENTED,
+        subclass_ + " does not support reading (yet).");
+  }
+
+  uint32_t readMessageEnd() {
+    throw TProtocolException(TProtocolException::NOT_IMPLEMENTED,
+        subclass_ + " does not support reading (yet).");
+  }
+
+  uint32_t readStructBegin(std::string& name) {
+    throw TProtocolException(TProtocolException::NOT_IMPLEMENTED,
+        subclass_ + " does not support reading (yet).");
+  }
+
+  uint32_t readStructEnd() {
+    throw TProtocolException(TProtocolException::NOT_IMPLEMENTED,
+        subclass_ + " does not support reading (yet).");
+  }
+
+  uint32_t readFieldBegin(std::string& name,
+			  TType& fieldType,
+			  int16_t& fieldId) {
+    throw TProtocolException(TProtocolException::NOT_IMPLEMENTED,
+        subclass_ + " does not support reading (yet).");
+  }
+  
+  uint32_t readFieldEnd() {
+    throw TProtocolException(TProtocolException::NOT_IMPLEMENTED,
+        subclass_ + " does not support reading (yet).");
+  }
+ 
+  uint32_t readMapBegin(TType& keyType,
+			TType& valType,
+			uint32_t& size) {
+    throw TProtocolException(TProtocolException::NOT_IMPLEMENTED,
+        subclass_ + " does not support reading (yet).");
+  }
+
+  uint32_t readMapEnd() {
+    throw TProtocolException(TProtocolException::NOT_IMPLEMENTED,
+        subclass_ + " does not support reading (yet).");
+  }
+
+  uint32_t readListBegin(TType& elemType,
+                         uint32_t& size) {
+    throw TProtocolException(TProtocolException::NOT_IMPLEMENTED,
+        subclass_ + " does not support reading (yet).");
+  }
+  
+  uint32_t readListEnd() {
+    throw TProtocolException(TProtocolException::NOT_IMPLEMENTED,
+        subclass_ + " does not support reading (yet).");
+  }
+
+  uint32_t readSetBegin(TType& elemType,
+			uint32_t& size) {
+    throw TProtocolException(TProtocolException::NOT_IMPLEMENTED,
+        subclass_ + " does not support reading (yet).");
+  }
+
+  uint32_t readSetEnd() {
+    throw TProtocolException(TProtocolException::NOT_IMPLEMENTED,
+        subclass_ + " does not support reading (yet).");
+  }
+
+  uint32_t readBool(bool& value) {
+    throw TProtocolException(TProtocolException::NOT_IMPLEMENTED,
+        subclass_ + " does not support reading (yet).");
+  }
+
+  uint32_t readByte(int8_t& byte) {
+    throw TProtocolException(TProtocolException::NOT_IMPLEMENTED,
+        subclass_ + " does not support reading (yet).");
+  }
+
+  uint32_t readI16(int16_t& i16) {
+    throw TProtocolException(TProtocolException::NOT_IMPLEMENTED,
+        subclass_ + " does not support reading (yet).");
+  }
+
+  uint32_t readI32(int32_t& i32) {
+    throw TProtocolException(TProtocolException::NOT_IMPLEMENTED,
+        subclass_ + " does not support reading (yet).");
+  }
+
+  uint32_t readI64(int64_t& i64) {
+    throw TProtocolException(TProtocolException::NOT_IMPLEMENTED,
+        subclass_ + " does not support reading (yet).");
+  }
+
+  uint32_t readDouble(double& dub) {
+    throw TProtocolException(TProtocolException::NOT_IMPLEMENTED,
+        subclass_ + " does not support reading (yet).");
+  }
+
+  uint32_t readString(std::string& str) {
+    throw TProtocolException(TProtocolException::NOT_IMPLEMENTED,
+        subclass_ + " does not support reading (yet).");
+  }
+
+
+ private:
+  std::string subclass_;
+};
+
+}}} // facebook::thrift::protocol
+
+#endif // #ifndef _THRIFT_PROTOCOL_TBINARYPROTOCOL_H_
diff --git a/lib/cpp/src/protocol/TProtocolException.h b/lib/cpp/src/protocol/TProtocolException.h
index 50959b7..2d542a0 100644
--- a/lib/cpp/src/protocol/TProtocolException.h
+++ b/lib/cpp/src/protocol/TProtocolException.h
@@ -33,6 +33,7 @@
     NEGATIVE_SIZE = 2,
     SIZE_LIMIT = 3,
     BAD_VERSION = 4,
+    NOT_IMPLEMENTED = 5,
   };
 
   TProtocolException() :