[TUBEMQ-267]Create C/C++ Message class (#182)

tubemq-client-twins/tubemq-client-cpp/inc/message.h

@@ -0,0 +1,78 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+#ifndef _TUBEMQ_CLIENT_MESSAGE_H_
+#define _TUBEMQ_CLIENT_MESSAGE_H_
+
+
+#include <list>
+#include <map>
+#include <string>
+#include <stdio.h>
+
+
+namespace tubemq {
+
+using namespace std;
+
+class Message {
+ public:
+  Message();
+  Message(const Message& target);
+  Message(const string& topic, const char* data, int datalen);
+  virtual ~Message();
+  Message& operator=(const Message& target);
+  const long GetMessageId() const;
+  void SetMessageId(long message_id);
+  const string& GetTopic() const;
+  void SetTopic(const string& topic);
+  const char* GetData() const;
+  int GetDataLength() const;
+  void setData(const char* data, int datalen);
+  const int GetFlag() const;
+  void SetFlag(int flag);
+  const map<string, string>& GetProperties() const;
+  int GetProperties(string& attribute);
+  bool HasProperty(const string& key);
+  bool GetProperty(const string& key, string& value);
+  bool GetFilterItem(string& value);
+  bool AddProperty(string& err_info, const string& key, const string& value);  
+
+ private:
+  void clearData();
+  void copyData(const char* data, int datalen);  
+  void copyProperties(const map<string, string>& properties);
+
+
+ private:
+  string topic_;
+  char* data_;
+  int   datalen_;
+  long  message_id_;
+  int   flag_;  
+  map<string, string> properties_;
+};
+
+}
+
+
+
+
+#endif
+

tubemq-client-twins/tubemq-client-cpp/src/message.cc

@@ -0,0 +1,249 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+#include <sstream> 
+#include <string.h> 
+
+#include "message.h"
+#include "utils.h"
+#include "const_config.h"
+
+
+namespace tubemq {
+
+
+// message flag's properties settings
+static const int kMsgFlagIncProperties = 0x01;
+// reserved property key Filter Item
+static const string kRsvPropKeyFilterItem = "$msgType$";
+// reserved property key message send time
+static const string kRsvPropKeyMsgTime = "$msgTime$";
+
+
+Message::Message() {
+  this->topic_      = "";
+  this->flag_       = 0;
+  this->message_id_ = config::kInvalidValue;
+  this->data_       = NULL;
+  this->datalen_    = 0;
+  this->properties_.clear();
+}
+
+Message::Message(const Message& target) {
+  this->topic_      = target.topic_;
+  this->message_id_ = target.message_id_;
+  copyData(target.data_, target.datalen_);
+  copyProperties(target.properties_);
+  this->flag_       = target.flag_;
+}
+
+Message::Message(const string& topic, const char* data, int datalen) {
+  this->topic_      = topic;
+  this->flag_       = 0;
+  this->message_id_ = config::kInvalidValue;
+  copyData(data, datalen);
+  this->properties_.clear();
+}
+
+Message::~Message() {
+  clearData();
+}
+
+Message& Message::operator=(const Message& target) {
+  if (this == &target) 
+    return *this;
+  this->topic_      = target.topic_;
+  this->message_id_ = target.message_id_;
+  clearData();
+  copyData(target.data_, target.datalen_);
+  copyProperties(target.properties_);
+  this->flag_       = target.flag_;
+  return *this;
+}
+
+const long Message::GetMessageId() const {
+  return this->message_id_;
+}
+
+void Message::SetMessageId(long message_id) {
+  this->message_id_ = message_id;
+}
+
+const string& Message::GetTopic() const {
+  return this->topic_;
+}
+
+void Message::SetTopic(const string& topic) {
+  this->topic_ = topic;
+}
+
+const char* Message::GetData() const {
+  return this->data_;
+}
+
+int Message::GetDataLength() const {
+  return this->datalen_;
+}
+
+void Message::setData(const char* data, int datalen) {
+  clearData();
+  copyData(data, datalen);
+}
+
+const int Message::GetFlag() const {
+  return this->flag_;
+}
+
+void Message::SetFlag(int flag) {
+  this->flag_ = flag;
+}
+
+const map<string, string>& Message::GetProperties() const {
+  return this->properties_;
+}
+
+int Message::GetProperties(string& attribute) {
+  attribute.clear();
+  map<string, string>::iterator it_map;
+  for (it_map = this->properties_.begin(); it_map != this->properties_.end(); ++it_map) {
+    if (!attribute.empty()) {
+      attribute += delimiter::kDelimiterComma;
+    }
+    attribute += it_map->first;
+    attribute += delimiter::kDelimiterEqual;
+    attribute += it_map->second;
+  }
+  return attribute.length();
+}
+
+bool Message::HasProperty(const string& key) {
+  map<string, string>::iterator it_map;
+  string trimed_key = Utils::Trim(key);
+  if (!trimed_key.empty()) {
+    it_map = this->properties_.find(trimed_key);
+    if (it_map != this->properties_.end()) {
+      return true;
+    }
+  }
+  return false;  
+}
+
+bool Message::GetProperty(const string& key, string& value) {
+  map<string, string>::iterator it_map;
+  string trimed_key = Utils::Trim(key);
+  if (!trimed_key.empty()) {
+    it_map = this->properties_.find(trimed_key);
+    if (it_map != this->properties_.end()) {
+      value = it_map->second;
+      return true;
+    }
+  }
+  return false;  
+}
+
+bool Message::GetFilterItem(string& value) {
+  return GetProperty(kRsvPropKeyFilterItem, value);
+}
+
+bool Message::AddProperty(string& err_info, const string& key, const string& value) {
+  string trimed_key = Utils::Trim(key);
+  string trimed_value = Utils::Trim(value);
+  if (trimed_key.empty() || trimed_value.empty()) {
+    err_info = "Not allowed null value of parmeter key or value";
+    return false;
+  }
+  if ((string::npos != trimed_key.find(delimiter::kDelimiterComma)) 
+    ||(string::npos != trimed_key.find(delimiter::kDelimiterEqual))) {
+    stringstream ss;
+    ss << "Reserved token '";
+    ss << delimiter::kDelimiterComma;
+    ss << "' or '";
+    ss << delimiter::kDelimiterEqual;
+    ss << "' in parmeter key!";
+    err_info = ss.str();
+    return false;
+  }
+  if ((string::npos != trimed_value.find(delimiter::kDelimiterComma)) 
+    ||(string::npos != trimed_value.find(delimiter::kDelimiterEqual))) {
+    stringstream ss;
+    ss << "Reserved token '";
+    ss << delimiter::kDelimiterComma;
+    ss << "' or '";
+    ss << delimiter::kDelimiterEqual;
+    ss << "' in parmeter value!";
+    err_info = ss.str();
+    return false;
+  }
+  if(trimed_key == kRsvPropKeyFilterItem 
+    || trimed_key == kRsvPropKeyMsgTime) {
+    stringstream ss;
+    ss << "Reserved token '";
+    ss << kRsvPropKeyFilterItem;
+    ss << "' or '";
+    ss << kRsvPropKeyMsgTime;
+    ss << "' must not be used in parmeter key!";
+    err_info = ss.str();
+    return false;
+  }
+  // add key and value
+  this->properties_[trimed_key] = trimed_value;
+  if (!this->properties_.empty()) {
+      this->flag_ |= kMsgFlagIncProperties;
+  }
+  err_info = "Ok";
+  return true;
+}
+
+void Message::clearData() {
+  if (this->data_ != NULL) {
+    delete[] this->data_;
+    this->data_ = NULL;
+    this->datalen_ = 0;
+  }
+}
+
+void Message::copyData(const char* data, int datalen) {
+  if (data == NULL) {
+    this->data_ = NULL;
+    this->datalen_ = 0;
+  } else {
+    this->datalen_ = datalen;
+    this->data_ = new char[datalen];
+    memset(this->data_, 0, datalen);
+    memcpy(this->data_, data, datalen);
+  }
+}
+
+void Message::copyProperties(const map<string, string>& properties) {
+  this->properties_.clear();
+  map<string, string>::const_iterator it_map;
+  for (it_map = properties.begin(); it_map != properties.end(); ++it_map) {
+    this->properties_[it_map->first] = it_map->second;
+  }
+  if (!this->properties_.empty()) {
+    this->flag_ |= kMsgFlagIncProperties;
+  }
+}
+
+
+}
+
+
+
+