OpenDDS之QosXml库编译(Windows + VS2019)-编程知识

1、需求背景
2、基础环境
3、编译xercesc
- 3.1、下载xercesc
- 3.2、编译xercesc
4、编译ACE_XML_Utils
- 4.1、生成XML_Utils解决方案
- 4.2、编译XML_Utils
5、编译QOS_XML_XSC_Handlerd
- 5.1、生成QOS_XML_XSC_Handlerd解决方案
- 5.2、编译QOS_XML_XSC_Handlerd
6、测试例子
- 6.1、生成dump解决方案
- 6.2、编译dump
- 6.3、OpenDDS的xml格式

1、需求背景

在使用OpenDDS中，需要对不同场景设计出不同的qos方案配置。但是每次写在代码中，后续维护扩展均受限，为此需要使用xml文件配置的方法。其实OpenDDS源码中已经提供了xml配置的方法，但是由于没有编译xml解析库，所以这部分的库就没有生成出来。

2、基础环境

VS2019
perl Opendds ace+tao 均已完成编译。
cmake(3.27)

3、编译xercesc

3.1、下载xercesc

官网链接：http://xerces.apache.org/xerces-c/download.cgi
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在Source Distributions 区域找最新的zip下载即可。

3.2、编译xercesc

解压下载好的库后，基本目录结构如下图所示：
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我们打开cmake-gui软件。需要填写souce code 和 build binaries 俩个路径。分别为源码路径和编译路径。然后点击【Configure】按钮，在弹出的界面选择VS2019其他默认即可。
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然后在下面的CMAKE_INSTALL_PREFIX属性设置安装路径。这里我的DDS路径为D:OpenDDS，所以我安装在了OpenDDS路径下。
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再次点击Configure 完成后，点击 Generate按钮。
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生成后，点击Open Project按钮，打开工程。

选择Debug-64环境后，打开CMakePredefinedTargets文件夹中找到ALL_BUILD，右击编译。完成后，找到下面的INSTALL工程，右击编译。就会把所编译生成的文件以及头文件输出到你在cmake那块配置的路径中。至此，xercesc的编译就完成了。

4、编译ACE_XML_Utils

ACE_XML_Utils需要xerces库的支持，所以在编译ACE和TAO时并没有生成。

4.1、生成XML_Utils解决方案

注：需要使用VS2019的命令行
在 %OpenDDS%\ACE_wrappers\ace\XML_Utils\路径下执行命令：

perl mwc.pl -type vs2019

在该路径下就会生成ACE_XML_Utils.sln
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4.2、编译XML_Utils

点击XML_Utils.sln打开工程。
在属性中需要增加以下配置：
在C/C++常规中增加xerces-c的头文件路径(D:\OpenDDS\xerces-c\include)
在链接器常规中增加xerces-c的库文件路径(D:\OpenDDS\xerces-c\lib)
在链接器输入中增加xerces-c_3D.lib库文件。(Debug是xerces-c_3D.lib，Release是xerces-c_3.lib)
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最后编译XML_Utils工程。成功生成。
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5、编译QOS_XML_XSC_Handlerd

5.1、生成QOS_XML_XSC_Handlerd解决方案

注：需要使用VS2019的命令行
在 %OpenDDS%\dds\DCPS\QOS_XML_Handler\路径下执行命令：

perl mwc.pl -type vs2019

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在该路径下就会生成ACE_XML_Utils.sln

5.2、编译QOS_XML_XSC_Handlerd

点击QOS_XML_XSC_Handlerd.sln打开工程。
在属性中需要增加以下配置：
在C/C++常规中增加xerces-c的头文件路径(D:\OpenDDS\xerces-c\include)
在链接器常规中增加xerces-c的库文件路径(D:\OpenDDS\xerces-c\lib)
在链接器输入中增加xerces-c_3D.lib库文件。(Debug是xerces-c_3D.lib，Release是xerces-c_3.lib)
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编译工程，成功生成。

6、测试例子

在%OpenDDS%\tests\DCPS\QoS_XML\dump有xml配置读取的例子。

6.1、生成dump解决方案

注：需要使用VS2019的命令行
在 %OpenDDS%\dds\DCPS\QOS_XML_Handler\路径下执行命令：

perl mwc.pl -type vs2019 -features xerces=1

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在该路径下就会生成dump.sln文件

6.2、编译dump

点击dump.sln打开工程。在qos_dump.cpp中就有所有的qos读取示例。
代码如下：


#include "dds/DCPS/QOS_XML_Handler/QOS_XML_Loader.h"
#include "dds/DdsDcpsC.h"int ACE_TMAIN (int, ACE_TCHAR *[])
{int retval = 0;try{OpenDDS::DCPS::QOS_XML_Loader xml_loader;DDS::ReturnCode_t const retcode = xml_loader.init (ACE_TEXT ("qos#TestProfile"));if (retcode == DDS::RETCODE_OK){DDS::ReturnCode_t retcode_qos;::DDS::DataWriterQos dw_qos;retcode_qos = xml_loader.get_datawriter_qos (dw_qos,ACE_TEXT("qos#TestProfile"),ACE_TEXT("TopicName"));if (retcode_qos != DDS::RETCODE_OK){ACE_ERROR ((LM_ERROR, "MAIN - ""get_datawriter_qos return an error. Retcode <%d>\n",retcode_qos));++retval;}if (dw_qos.history.kind != ::DDS::KEEP_ALL_HISTORY_QOS){ACE_ERROR ((LM_ERROR, "MAIN - ""get_datawriter_qos return an invalid history kind.\n"));++retval;}if (dw_qos.history.depth != 5){ACE_ERROR ((LM_ERROR, "MAIN - ""get_datawriter_qos return an invalid history depth.\n"));++retval;}::DDS::DataReaderQos dr_qos;retcode_qos = xml_loader.get_datareader_qos (dr_qos,ACE_TEXT("qos#TestProfile"),ACE_TEXT("TopicName"));if (retcode_qos != DDS::RETCODE_OK){ACE_ERROR ((LM_ERROR, "MAIN - ""get_datareader_qos return an error. Retcode <%d>\n",retcode_qos));++retval;}if (dr_qos.type_consistency.ignore_sequence_bounds != true){ACE_ERROR ((LM_ERROR, "PARSEXML - ""get_datareader_qos returned an invalid type type_consistency ignore_sequence_bounds.\n"));++retval;}if (dr_qos.type_consistency.ignore_string_bounds != true){ACE_ERROR ((LM_ERROR, "PARSEXML - ""get_datareader_qos return an invalid type type_consistency ignore_string_bounds.\n"));++retval;}if (dr_qos.type_consistency.ignore_member_names != true){ACE_ERROR ((LM_ERROR, "PARSEXML - ""get_datareader_qos return an invalid type type_consistency ignore_member_names.\n"));++retval;}if (dr_qos.type_consistency.prevent_type_widening != true){ACE_ERROR ((LM_ERROR, "PARSEXML - ""get_datareader_qos return an invalid type type_consistency prevent_type_widening.\n"));++retval;}if (dr_qos.type_consistency.force_type_validation != true){ACE_ERROR ((LM_ERROR, "PARSEXML - ""get_datareader_qos return an invalid type type_consistency force_type_validation.\n"));++retval;}if (dr_qos.representation.value.length() != 2){ACE_ERROR ((LM_ERROR, "PARSEXML - ""get_datareader_qos return an invalid length %d for data_representation.\n",dr_qos.representation.value.length()));++retval;}::DDS::TopicQos tp_qos;retcode_qos = xml_loader.get_topic_qos (tp_qos,ACE_TEXT("qos#TestProfile"),ACE_TEXT("TopicName"));if (retcode_qos != DDS::RETCODE_OK){ACE_ERROR ((LM_ERROR, "MAIN - ""get_topic_qos return an error. Retcode <%d>\n",retcode_qos));++retval;}if (tp_qos.durability_service.history_kind != DDS::KEEP_LAST_HISTORY_QOS){ACE_ERROR ((LM_ERROR, "PARSEXML - ""get_topic_qos returned an invalid type durability_service history_kind.\n"));++retval;}::DDS::PublisherQos pub_qos;retcode_qos = xml_loader.get_publisher_qos (pub_qos,ACE_TEXT("qos#TestProfile"));if (retcode_qos != DDS::RETCODE_OK){ACE_ERROR ((LM_ERROR, "MAIN - ""get_publisher_qos return an error. Retcode <%d>\n",retcode_qos));++retval;}::DDS::SubscriberQos sub_qos;retcode_qos = xml_loader.get_subscriber_qos (sub_qos,ACE_TEXT("qos#TestProfile"));if (retcode_qos != DDS::RETCODE_OK){ACE_ERROR ((LM_ERROR, "MAIN - ""get_subscriber_qos return an error. Retcode <%d>\n",retcode_qos));++retval;}::DDS::DomainParticipantQos dp_qos;retcode_qos = xml_loader.get_participant_qos (dp_qos,ACE_TEXT("qos#TestProfile"));if (retcode_qos != DDS::RETCODE_OK){ACE_ERROR ((LM_ERROR, "MAIN - ""get_participant_qos return an error. Retcode <%d>\n",retcode_qos));++retval;}}else{ACE_ERROR ((LM_ERROR, "MAIN - Init return an error. Retcode <%d>\n",retcode));++retval;}}catch (const CORBA::Exception& ex){ex._tao_print_exception ("QOS_Dump::main\n");return -1;}catch (...){ACE_ERROR ((LM_ERROR, ACE_TEXT ("Unexpected exception\n")));return 1;}return retval;
}

6.3、OpenDDS的xml格式

<?xml version="1.0" encoding="UTF-8"?>
<dds xmlns="http://www.omg.org/dds"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.omg.org/dds dds_qos.xsd"><qos_profile name="TestProfile"><datareader_qos><representation><value><element>XCDR_DATA_REPRESENTATION</element><element>XCDR2_DATA_REPRESENTATION</element></value></representation><type_consistency><kind>ALLOW_TYPE_COERCION</kind><ignore_sequence_bounds>true</ignore_sequence_bounds><ignore_string_bounds>true</ignore_string_bounds><ignore_member_names>true</ignore_member_names><prevent_type_widening>true</prevent_type_widening><force_type_validation>true</force_type_validation></type_consistency><durability><kind>VOLATILE_DURABILITY_QOS</kind></durability><deadline><period><sec>DURATION_INFINITE_SEC</sec><nanosec>DURATION_INFINITE_NSEC</nanosec></period></deadline><latency_budget><duration><sec>0</sec><nanosec>0</nanosec></duration></latency_budget><liveliness><kind>AUTOMATIC_LIVELINESS_QOS</kind><lease_duration><sec>DURATION_INFINITE_SEC</sec><nanosec>DURATION_INFINITE_NSEC</nanosec></lease_duration></liveliness><reliability><kind>BEST_EFFORT_RELIABILITY_QOS</kind><max_blocking_time><sec>0</sec><nanosec>100000000</nanosec></max_blocking_time></reliability><destination_order><kind>BY_RECEPTION_TIMESTAMP_DESTINATIONORDER_QOS</kind></destination_order><history><kind>KEEP_LAST_HISTORY_QOS</kind><depth>1</depth></history><resource_limits><max_samples>LENGTH_UNLIMITED</max_samples><max_instances>LENGTH_UNLIMITED</max_instances><max_samples_per_instance>LENGTH_UNLIMITED</max_samples_per_instance></resource_limits><!--user_data><value></value></user_data--><ownership><kind>SHARED_OWNERSHIP_QOS</kind></ownership><time_based_filter><minimum_separation><sec>0</sec><nanosec>0</nanosec></minimum_separation></time_based_filter><reader_data_lifecycle><autopurge_nowriter_samples_delay><sec>DURATION_INFINITE_SEC</sec><nanosec>DURATION_INFINITE_NSEC</nanosec></autopurge_nowriter_samples_delay><autopurge_disposed_samples_delay><sec>DURATION_INFINITE_SEC</sec><nanosec>DURATION_INFINITE_NSEC</nanosec></autopurge_disposed_samples_delay></reader_data_lifecycle></datareader_qos><datawriter_qos><durability><kind>VOLATILE_DURABILITY_QOS</kind></durability><durability_service><service_cleanup_delay><sec>0</sec><nanosec>0</nanosec></service_cleanup_delay><history_kind>KEEP_LAST_HISTORY_QOS</history_kind><history_depth>1</history_depth><max_samples>LENGTH_UNLIMITED</max_samples><max_instances>LENGTH_UNLIMITED</max_instances><max_samples_per_instance>LENGTH_UNLIMITED</max_samples_per_instance></durability_service><deadline><period><sec>DURATION_INFINITE_SEC</sec><nanosec>DURATION_INFINITE_NSEC</nanosec></period></deadline><latency_budget><duration><sec>0</sec><nanosec>0</nanosec></duration></latency_budget><liveliness><kind>AUTOMATIC_LIVELINESS_QOS</kind><lease_duration><sec>DURATION_INFINITE_SEC</sec><nanosec>DURATION_INFINITE_NSEC</nanosec></lease_duration></liveliness><reliability><kind>RELIABLE_RELIABILITY_QOS</kind><max_blocking_time><sec>0</sec><nanosec>100000000</nanosec></max_blocking_time></reliability><destination_order><kind>BY_RECEPTION_TIMESTAMP_DESTINATIONORDER_QOS</kind></destination_order><history><kind>KEEP_ALL_HISTORY_QOS</kind><depth>5</depth></history><resource_limits><max_samples>LENGTH_UNLIMITED</max_samples><max_instances>LENGTH_UNLIMITED</max_instances><max_samples_per_instance>LENGTH_UNLIMITED</max_samples_per_instance></resource_limits><transport_priority><value>0</value></transport_priority><lifespan><duration><sec>DURATION_INFINITE_SEC</sec><nanosec>DURATION_INFINITE_NSEC</nanosec></duration></lifespan><!--user_data><value></value></user_data--><ownership><kind>SHARED_OWNERSHIP_QOS</kind></ownership><ownership_strength><value>0</value></ownership_strength><writer_data_lifecycle><autodispose_unregistered_instances>true</autodispose_unregistered_instances></writer_data_lifecycle></datawriter_qos><domainparticipant_qos><!--user_data><value></value></user_data--><entity_factory><autoenable_created_entities>true</autoenable_created_entities></entity_factory></domainparticipant_qos><subscriber_qos><presentation><access_scope>INSTANCE_PRESENTATION_QOS</access_scope><coherent_access>false</coherent_access><ordered_access>false</ordered_access></presentation><partition><name><element>ABC</element><element>DEF</element><element>GHI</element><element>JKL</element><element>MNO</element><element>PQR</element><element>STU</element><element>VW</element><element>XYZ</element></name></partition><!--group_data><value></value></group_data--><entity_factory><autoenable_created_entities>true</autoenable_created_entities></entity_factory></subscriber_qos><publisher_qos><presentation><access_scope>INSTANCE_PRESENTATION_QOS</access_scope><coherent_access>false</coherent_access><ordered_access>false</ordered_access></presentation><partition><name><element>XYZ</element><element>VW</element><element>STU</element><element>PQR</element><element>MNO</element><element>JKL</element><element>GHI</element><element>DEF</element><element>ABC</element></name></partition><!--group_data><value></value></group_data--><entity_factory><autoenable_created_entities>true</autoenable_created_entities></entity_factory></publisher_qos><topic_qos><!--topic_data><value></value></topic_data--><durability><kind>VOLATILE_DURABILITY_QOS</kind></durability><durability_service><service_cleanup_delay><sec>0</sec><nanosec>0</nanosec></service_cleanup_delay><history_kind>KEEP_LAST_HISTORY_QOS</history_kind><history_depth>1</history_depth><max_samples>LENGTH_UNLIMITED</max_samples><max_instances>LENGTH_UNLIMITED</max_instances><max_samples_per_instance>LENGTH_UNLIMITED</max_samples_per_instance></durability_service><deadline><period><sec>DURATION_INFINITE_SEC</sec><nanosec>DURATION_INFINITE_NSEC</nanosec></period></deadline><latency_budget><duration><sec>0</sec><nanosec>0</nanosec></duration></latency_budget><liveliness><kind>AUTOMATIC_LIVELINESS_QOS</kind><lease_duration><sec>DURATION_INFINITE_SEC</sec><nanosec>DURATION_INFINITE_NSEC</nanosec></lease_duration></liveliness><reliability><kind>BEST_EFFORT_RELIABILITY_QOS</kind><max_blocking_time><sec>0</sec><nanosec>100000000</nanosec></max_blocking_time></reliability><destination_order><kind>BY_RECEPTION_TIMESTAMP_DESTINATIONORDER_QOS</kind></destination_order><history><kind>KEEP_LAST_HISTORY_QOS</kind><depth>1</depth></history><resource_limits><max_samples>LENGTH_UNLIMITED</max_samples><max_instances>LENGTH_UNLIMITED</max_instances><max_samples_per_instance>LENGTH_UNLIMITED</max_samples_per_instance></resource_limits><transport_priority><value>0</value></transport_priority><lifespan><duration><sec>DURATION_INFINITE_SEC</sec><nanosec>DURATION_INFINITE_NSEC</nanosec></duration></lifespan><ownership><kind>SHARED_OWNERSHIP_QOS</kind></ownership></topic_qos></qos_profile>
</dds>