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diff --git a/sca-cpp/trunk/contrib/doc/CppExtension.html b/sca-cpp/trunk/contrib/doc/CppExtension.html new file mode 100644 index 0000000000..6e7420a9d4 --- /dev/null +++ b/sca-cpp/trunk/contrib/doc/CppExtension.html @@ -0,0 +1,430 @@ + +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> +<!-- + 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. +--> + +<HTML> +<HEAD> + <META CONTENT="text/html; charset=iso-8859-1" HTTP-EQUIV="Content-Type"> + <META CONTENT="text/css" HTTP-EQUIV="Content-Style-Type"> + <STYLE MEDIA="all" TYPE="text/css"> +@import url("css/maven-base.css"); +@import url("css/maven-theme.css"); + </STYLE> + + <LINK HREF="css/maven-theme.css" MEDIA="print" REL="stylesheet" + TYPE="text/css"> + <TITLE>Tuscany SCA Native - Creating C++ SCA Components</TITLE> +</HEAD> + +<BODY> +<DIV ID="bodyColumn"> + <DIV ID="contentBox"> + <DIV CLASS="section"> + <H1>Tuscany SCA Native - C++ Extension</H1> + <P>The Tuscany C++ extension allows C++ classes to be used as components in + SCA composites and as clients that can invoke SCA services. + </P> + <P>This document describes how to build and install the C++ extension and create and run SCA + components in Tuscany SCA Native milestone release 3. + </P> + <P>See the <A HREF="http://www.osoa.org/display/Main/Service+Component+Architecture+Specifications">SCA + C++ Client and Implementation specification</A> for more details about the SCA C++ + programming model. + </P> + <P>See <A HREF="../samples/CppCalculator/README.html">CppCalculator</A> or + <A HREF="../samples/CppBigBank/README.html">CppBigBank</A> for samples that + demonstrate the use of C++ components + </P> + </DIV> + + <DIV CLASS="section"> + <H2>Contents</H2> + <OL> + <LI><A HREF="#requirements">System Requirements</A></LI> + <LI><A HREF="#install">Installing the Tuscany SCA C++ Extension..</A> + <UL> + <LI><A HREF="#linuxbin">..from the binary release on Linux and Mac OS X</A></LI> + <LI><A HREF="#linuxsrc">..from the source release on Linux and Mac OS X</A></LI> + <LI><A HREF="#winbin">..from the binary release on Windows</A></LI> + <LI><A HREF="#winsrc">..from the source release on Windows</A></LI> + </UL></LI> + <LI><A HREF="#components">Creating and deploying an SCA C++ Component</A></LI> + <LI><A HREF="#help">Getting help</A></LI> + </OL> + </DIV> + <DIV CLASS="section"> + <A NAME="requirements"><H2>System Requirements</H2></A> + + <P>In order to install and use the Tuscany SCA C++ Extension there are some + extra requirements in addition to the <A HREF="../GettingStarted.html#requirements">Tuscany + SCA requirements</A>:</P> + <TABLE CLASS="bodyTable"> + + <TBODY> + <TR CLASS="a"> + <TD><B>Software</B></TD> + <TD><B>Download Link</B></TD> + </TR> + <TR CLASS="b"> + <TD>Java SDK 1.4 or later</TD> + <TD><A HREF="http://java.sun.com/javase/downloads/index.jsp" + TARGET="_blank">http://java.sun.com/javase/downloads</A><BR/> + For building and running the SCAGEN code generation tool, which is used when developing + Tuscany SCA C++ components. Please download and follow the installation instructions</TD> + </TR> + <TR CLASS="a"> + <TD>Apache Ant 1.6 or later</TD> + <TD><A HREF="http://ant.apache.org" TARGET="_blank">http://ant.apache.org</A><BR/> + For building the SCAGEN code generation tool. This is only required when building + the C++ extension from a source distribution of Tuscany SCA Native. + Please download and follow the installation instructions</TD> + </TR> + </TBODY> + </TABLE> + </DIV> + + <DIV CLASS="section"> + <A NAME="install"><H2>Installing the Tuscany SCA C++ Extension</H2></A> + <A NAME="linuxbin"><H3>Getting the Tuscany SCA C++ Extension working with the binary release on Linux and Mac OS X</H3></A> + <OL> + <LI>Add the <tuscany_sca_install_dir>/extensions/cpp/lib directory to the PATH environment variable</LI> + </OL> + <A NAME="linuxsrc"><H3>Getting the Tuscany SCA C++ Extension working with the source release on Linux and Mac OS X</H3></A> + <OL> + <LI>You will need the Tuscany SCA kernel and SDO libraries - follow the instructions + <A HREF="../GettingStarted.html">here</A> to build the SCA libraries and default extensions</LI> + <LI>The following environment variables are required: + <UL> + <LI>TUSCANY_SCACPP=<path to built Tuscany SCA></LI> + <LI>TUSCANY_SDOCPP=<path to installed Tuscany SDO></LI> + </UL></LI> + <LI>Build the C++ source only with the following command sequence: + <UL> + <LI>cd <tuscany_sca_install_dir></LI> + <LI>./configure --prefix=$TUSCANY_SCACPP --enable-cpp --enable-wsbinding=no</LI> + <LI>make</LI> + <LI>make install</LI> + </UL> + NOTE: If you don't provide a --prefix configure option, it will by default install into + /usr/local/tuscany/sca</LI> + </OL> + + <A NAME="winbin"><H3>Getting the Tuscany SCA C++ Extension working with the binary release on Windows</H3></A> + <OL> + <LI>Add the <tuscany_sca_install_dir>/extensions/cpp/lib directory to the PATH environment variable</LI> + </OL> + <A NAME="winsrc"><H3>Getting the Tuscany SCA C++ Extension working with the source release on Windows</H3></A> + <OL> + <LI>Unzip the supplied source zip file</LI> + <LI>The following environment variables are required: + <UL> + <LI>TUSCANY_SCACPP=<path to built Tuscany SCA> + <LI>TUSCANY_SDOCPP=<path to installed Tuscany SDO> + </UL></LI> + <LI>You must have set up the environment for Microsoft Visual C++ tools. The build command + will call vcvars32 to set the environment. Ensure the directory containing this is on your path. + This will be where you installed the compiler.</LI> + <LI>Build the source: + <UL> + <LI>cd <to where you unzipped the source></LI> + <LI>build</LI> + </UL> + This will build all the projects and put the required output into the 'deploy' directory<BR/><BR/> + Alternatively, open the workspace at <tuscany_sca_install_dir>/projects/tuscany_sca/tuscany_sca.dsw + in Visual Studio 6 or at at <tuscany_sca_install_dir>/projectsvc7/tuscany_sca/tuscany_sca.sln + in Visual Studio 7.1 - you can build projects individually + <LI>Set the TUSCANY_SCACPP environment variable to point to the 'deploy' directory that was just created</LI> + </OL> + </DIV> + + <DIV CLASS="section"> + <A NAME="components"><H2>Creating and deploying an SCA C++ Component</H2></A> + <P>Each SCA C++ component needs: + </P> + <UL> + <LI>A service header file that defines the operations that can be invoked on the + component + </LI> + <LI>An implementation header file that defines the implementation and extends + the service header file + </LI> + <LI>A C++ implementation of the service that implements the operations defined + in the service header file + </LI> + <LI>Proxy and wrapper header and implementation files generated by the Tuscany + C++ SCAGEN tool + </LI> + <LI>A service definition in a .componentType file + </LI> + <LI>An SCDL component definition within an SCDL composite file. Usually this + composite file will contain multiple components configured and assembled together. + </LI> + </UL> + <P>Once these items are in place for each component in your composite, you will need to + deploy this composite to your SCA system. In this release we are + using the SCA recursive composition model to do this. You simply create another + SCDL component definition in a separate composite file that will represent the composite + you created above in the SCA system. Follow the steps below to see each of these items + being created and used. + </P> + <P>In this section we will use the Calculator sample as a worked example. + The Calculator code and files can be found at samples/CppCalculator and has been + developed further than the details specified below. In the interests of + readability, the example used below takes the simplest path. + </P> + <OL> + <LI>Create the service header file that defines the operations your component + will implement. E.g. Calculator.h contains the following:<BR/> + <PRE>#ifndef CALCULATOR_H +#define CALCULATOR_H +class Calculator +{ +public: + virtual float add(float arg1, float arg2) = 0; + virtual float sub(float arg1, float arg2) = 0; + virtual float mul(float arg1, float arg2) = 0; + virtual float div(float arg1, float arg2) = 0; +}; + +#endif</PRE> + </LI> + <LI>Create the implementation header file that extends the service header file. + E.g. CalculatorImpl.h contains the following:<BR/> + <PRE>#ifndef CALCULATORIMPL_H +#define CALCULATORIMPL_H + +#include "Calculator.h" + +class CalculatorImpl : public Calculator +{ +public: + CalculatorImpl(); + virtual ~CalculatorImpl(); + + // Calculator interface + virtual float add(float arg1, float arg2); + virtual float sub(float arg1, float arg2); + virtual float mul(float arg1, float arg2); + virtual float div(float arg1, float arg2); +}; + +#endif</PRE> + </LI> + <LI>Create the implementation for the component based on the implementation + header file. E.g. CalculatorImpl.cpp contains the following code:<BR/> + <PRE>#include "CalculatorImpl.h" +#include <stdio.h> + +CalculatorImpl::CalculatorImpl() +{ +} + +CalculatorImpl::~CalculatorImpl() +{ +} + +// Calculator interface +float CalculatorImpl::add(float arg1, float arg2) +{ + float result = arg1 + arg2; + + printf("CalculatorImpl::add %f + %f = %f\n", arg1, arg2, result); + return result; +} + +float CalculatorImpl::sub(float arg1, float arg2) +{ + float result = arg1 - arg2; + printf("CalculatorImpl::sub %f - %f = %f\n", arg1, arg2, result); + return result; +} + +float CalculatorImpl::div(float arg1, float arg2) +{ + float result = arg1 / arg2; + printf("CalculatorImpl::div %f / %f = %f\n", arg1, arg2, result); + return result; +} + +float CalculatorImpl::mul(float arg1, float arg2) +{ + float result = arg1 * arg2; + printf("CalculatorImpl::mul %f * %f = %f\n", arg1, arg2, result); + return result; +}</PRE> + </LI> + <LI>Create the componentType file for your component to define the service that + your component provides. The file must be named after your implementation + class and specifies the name of the service and the service header file + (which describes the service operations). E.g. CalculatorImpl.componentType + contains the following XML:<BR/> + <PRE><componentType xmlns="http://www.osoa.org/xmlns/sca/1.0"> + + <service name="CalculatorService"> + <interface.cpp header="Calculator.h"/> + </service> + +</componentType></PRE> + </LI> + <LI>Create a sample.calculator.composite file for your composite and define your + component within it. The component definition specifies the implementation + library to use (a .dll file on Windows, a .so file on Linux and a .dylib file on Mac OS X) and the + implementation header file (which describes the implementation class). Component + properties and references to other services can also be specified here. E.g. the + Calculator sample.calculator.composite file contains the following XML:<BR/> + <PRE><composite xmlns="http://www.osoa.org/xmlns/sca/1.0" + name="sample.calculator"> + + <component name="CalculatorComponent"> + <implementation.cpp library="Calculator" header="CalculatorImpl.h"/> + </component> + +</composite></PRE> + </LI> + <LI>Generate the proxy and wrapper classes and header files using the SCAGEN + tool. These classes are used by the Tuscany SCA C++ runtime to enable + service implementations to be invoked from a client or another component. + Run the SCAGEN tool, specifying the directory where your header files, + sca.composite and componentType file are and the directory where you + want the generated files to be placed. E.g. on Windows, the + following command is run from the directory where Tuscany SCA is deployed:<BR/> + <PRE>./extensions/cpp/bin/scagen.bat -dir ./samples/CppCalculator/sample.calculator -output ./samples/CppCalculator/sample.calculator</PRE> + which produces the following files: + <UL> + <LI>CalculatorImpl_CalculatorService_Proxy.h</LI> + <LI>CalculatorImpl_CalculatorService_Proxy.cpp</LI> + <LI>CalculatorImpl_CalculatorService_Wrapper.h</LI> + <LI>CalculatorImpl_CalculatorService_Wrapper.cpp</LI> + </UL> + </LI> + <LI>Compile and link the code that has been written and generated. This will + produce a .dll or .so library file. The name should match the library name + specified in the sample.calculator.composite file. + </LI> + <LI>Create the sample.calculator.solution.composite file and define the Calculator composite + as a component within it. This is used to include the Calculator composite in the SCA system + and should specify the composite name used in the sample.calculator.composite file. + E.g. the Calculator sample.calculator.solution.composite + file contains the following XML:<BR/> + <PRE><composite xmlns="http://www.osoa.org/xmlns/sca/1.0" + name="sample.calculator.solution"> + + <component name="sample.calculator.CalculatorComponent"> + <implementation.composite name="sample.calculator" /> + </component> + +</composite></PRE> + </LI> + <LI>Deploy the various files into the SCA directory structure, as follows: + <UL> + <LI><deploy_root>/CompositeName/CompositeName.composite </LI> + <LI><deploy_root>/CompositeName/Implementation.componentType </LI> + <LI><deploy_root>/CompositeName/Implementation.dll (or .so on Linux and .dylib on Mac OS X) </LI> + <LI><deploy_root>/SolutionName.composite </LI> + </UL> + E.g. for the Calculator sample the structure is: + <UL> + <LI>samples/CppCalculator/deploy/sample.calculator/Calculator.h </LI> + <LI>samples/CppCalculator/deploy/sample.calculator/CalculatorImpl.h </LI> + <LI>samples/CppCalculator/deploy/sample.calculator/sample.calculator.composite </LI> + <LI>samples/CppCalculator/deploy/sample.calculator/CalculatorImpl.componentType</LI> + <LI>samples/CppCalculator/deploy/sample.calculator/Calculator.dll </LI> + <LI>samples/CppCalculator/deploy/sample.calculator.solution.composite</LI> + </UL> + </LI> + <LI>Your component, composite and subsystem are now ready to be invoked. Create a + client that will call the service. E.g. the Calculator client (in the + CalculatorClient.cpp file) contains code similar to the following:<BR/> + <PRE>try +{ + // Locate the service + CompositeContext myContext = CompositeContext::getCurrent(); + Calculator *calcService = (Calculator*) myContext.locateService("CalculatorComponent/CalculatorService"); + if (calcService == 0) + { + cout << "calculator_client: Unable to find Calculator service" << endl; + } + else + { + float result = calcService->add(arg1, arg2); + cout << "calculator_client add(" << arg1 << "," << arg2 << ") = " << result << endl; + } +} +catch (ServiceRuntimeException& ex) +{ + cout << "calculator_client: Error whilst invoking Tuscany: " << + ex.getMessageText() << endl; +} +</PRE> + </LI> + <LI>Compile, link and run the client that has been created. You should + (hopefully!) see your component invoked. Remember you will need to have the + TUSCANY_SCACPP and TUSCANY_SDOCPP environment variables set, + as well as the SCA and SDO bin directories on + your PATH on Windows or the SCA and SDO lib directories on your LD_LIBRARY_PATH on Linux + and your DYLD_LIBRARY_PATH on Mac OS X. You will also need to set the TUSCANY_SCACPP_SYSTEM_ROOT + and TUSCANY_SCACPP_DEFAULT_COMPONENT environment variables to the + path to your SCA component directory structure and the default component respectively. + TUSCANY_SCACPP_SYSTEM_ROOT is the directory where the SCA runtime will look for any + .composite files and TUSCANY_SCACPP_DEFAULT_COMPONENT is the name of the base component + to be used by SCA clients or containers when finding services - this component must be + an instance of a composite (i.e. contain an <implementation.composite> element). + <BR/> + E.g. on Windows run the following commands: + <UL> + <LI>set TUSCANY_SCACPP=C:/tuscany_sca </LI> + <LI>set TUSCANY_SDOCPP=C:/tuscany_sdo </LI> + <LI>set PATH=%PATH%;C:/tuscany_sca/bin;C:/tuscany_sdo/bin </LI> + <LI>set TUSCANY_SCACPP_SYSTEM_ROOT=C:/tuscany_sca/samples/CppCalculator/deploy</LI> + <LI>set TUSCANY_SCACPP_DEFAULT_COMPONENT=sample.calculator.CalculatorComponent</LI> + <LI>./calculator_client.exe </LI> + </UL> + </LI> + <LI>Optionally, enable Tuscany logging by setting the TUSCANY_SCACPP_LOGGING + environment variable with the level you wish to log at (0 for minimal + logging, up to 9 for more detailed logging) and the TUSCANY_SCACPP_LOG + environment variable to define the file to log to (if this is not set, + logging will go to the console). E.g. on Windows run the following + commands: + <UL> + <LI>set TUSCANY_SCACPP_LOGGING=5 </LI> + <LI>set TUSCANY_SCACPP_LOG=C:/tuscany/mylogfile.txt</LI> + </UL> + </LI> + </OL> + </DIV> + <DIV CLASS="section"> + <A NAME="help"><H2>Getting Help</H2></A> + + <P>First place to look is at the Tuscany FAQ at + <A HREF="http://incubator.apache.org/tuscany/faq.html" + TARGET="_blank">http://incubator.apache.org/tuscany/faq.html</A> </P> + + <P>Any problem with this release can be reported to the Tuscany + <A HREF="http://incubator.apache.org/tuscany/mail-lists.html" + TARGET="_blank">mailing lists</A> or create a JIRA issue at <A HREF="http://issues.apache.org/jira/browse/Tuscany" + TARGET="_blank">http://issues.apache.org/jira/browse/Tuscany</A>.</P> + </DIV> + </DIV> +</DIV> +</BODY> + +</HTML> + |