diff options
Diffstat (limited to 'tags/cpp-1.0-incubating-M2-RC2/sca/doc/PythonExtension.html')
| -rw-r--r-- | tags/cpp-1.0-incubating-M2-RC2/sca/doc/PythonExtension.html | 296 |
1 files changed, 0 insertions, 296 deletions
diff --git a/tags/cpp-1.0-incubating-M2-RC2/sca/doc/PythonExtension.html b/tags/cpp-1.0-incubating-M2-RC2/sca/doc/PythonExtension.html deleted file mode 100644 index 65691b89e2..0000000000 --- a/tags/cpp-1.0-incubating-M2-RC2/sca/doc/PythonExtension.html +++ /dev/null @@ -1,296 +0,0 @@ -<!-- - 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. ---> - - -<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> -<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 for C++ - Python Extension</TITLE> -</HEAD> - -<BODY> -<DIV ID="bodyColumn"> - <DIV ID="contentBox"> - <DIV CLASS="section"> - <H2>Tuscany SCA for C++ - Python Extension</H2> - - <P>The Tuscany Python extension allows Python scripts to be used as components in - SCA composites and as clients that can invoke SCA services. - </P> - <P>See <A HREF="../samples/PythonCalculator/README.html">PythonCalculator</A> for - a sample that demonstrates the use of the Python extension. - </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 Python Extension..</A> - <UL> - <LI><A HREF="#linuxbin">..from the binary release on Linux</A></LI> - <LI><A HREF="#linuxsrc">..from the source release on Linux</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="#pm">The Tuscany Python Programming Model</A></LI> - <UL> - <LI><A HREF="#clients">Clients</A></LI> - <LI><A HREF="#components">SCA Components</A></LI> - <LI><A HREF="#references">Component references</A></LI> - <LI><A HREF="#properties">Component properties</A></LI> - </UL> - <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 Python 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>Python version 2.3.4 or higher</TD> - - <TD> - <A HREF="http://www.python.org/download/" - TARGET="_blank">http://www.python.org/download/</A><BR/> - Please download and follow the installation instructions - </TD> - </TR> - </TBODY> - </TABLE> - </DIV> - - <DIV CLASS="section"> - <A NAME="install"><H2>Installing the Tuscany SCA Python Extension</H2></A> - <A NAME="linuxbin"><H3>Getting the Tuscany SCA Python Extension working with the binary release on Linux</H3></A> - <OL> - <LI>Extract the binary tar package to a folder</LI> - <LI>Set the TUSCANY_SCACPP environment variable to point to the directory that was just extracted</LI> - <LI>Add the <tuscany_sca_install_dir>/lib directory to the LD_LIBRARY_PATH <!--(Linux) or DYLD_LIBRARY_PATH (MacOS X)--> environment variable</LI> - <LI>Add the <tuscany_sca_install_dir>/extensions/python/lib directory to the PYTHONPATH environment variable</LI> - </OL> - <A NAME="linuxsrc"><H3>Getting the Tuscany SCA Python Extension working with the source release on Linux</H3></A> - <OL> - <LI>You will need the Tuscany SCA 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>TUSCANY_SDOCPP=<path to installed Tuscany SDO> - <LI>PYTHON_LIB=<path to Python libraries></LI> - <LI>PYTHON_INCLUDE=<path to Python includes></LI> - <LI>PYTHON_VERSION=<name of the Python version><BR/> - Note: If you are using a default installation of Python 2.3 these are usually:<BR/> - PYTHON_LIB=/usr/lib<BR/> - PYTHON_INCLUDE=/usr/include/python2.3<BR/> - PYTHON_VERSION=python2.3<BR/></LI> - </UL></LI> - <LI>Build the Python source only with the following command sequence: - <UL> - <LI>cd <tuscany_sca_install_dir></LI> - <LI>./configure --prefix=$TUSCANY_SCACPP --enable-python --enable-cpp=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 Python Extension working with the binary release on Windows</H3></A> - <OL> - <LI>Unzip the supplied zip file to a folder</LI> - <LI>Set the TUSCANY_SCACPP environment variable to point to the directory that was just unzipped</LI> - <LI>Add the <tuscany_sca_install_dir>\bin directory to the PATH environment variable</LI> - <LI>Add the <tuscany_sca_install_dir>\extensions\python\bin directory to the PYTHONPATH environment variable</LI> - </OL> - <A NAME="winsrc"><H3>Getting the Tuscany SCA Python 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> - <LI>PYTHON_HOME=<path to installed Python> - </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="pm"><H2>The Tuscany Python Programming Model</H2></A> - <P>This section will explain - the Tuscany Python programming model to help you to write your own Python - components and clients. - </P> - <P>The Tuscany Python component and client support comes from a Python extension - package that is built in the <tuscany_sca_install_dir>/extensions/python/bin - directory on Windows and <tuscany_sca_install_dir>/extensions/python/lib on - Linux. This package must be made available to your Python environment by - adding this directory to your PYTHONPATH environment variable. This makes the sca - module available for use by clients and allows references and properties to be - used in your Python components - </P> - <A NAME="clients"><H3>Clients</H3></A> - <P>Using the sca module, a Python client can search for an SCA service with: - </P> -<PRE>import sca - -calculator = sca.locateservice("CalculatorComponent/CalculatorService") -</PRE> - <P>This finds the component and service as defined in the composite and componentType - side files and returns a proxy object that can call the SCA service. You can then - simply call a business method on "calculator", like this: - </P> -<PRE>result = calculator.add(12.3, 45.6)</PRE> - </P> - <A NAME="components"><H3>Components</H3></A> - <P>Python component implementations are standard Python scripts, where class-level - functions or module-level functions can be invoked by the Tuscany runtime. To - use a Python component implementation, use the implementation.python element in - your .composite file. For example, the following snippet will use the Python script - at path/to/module/PythonModuleName.py, where the path is relative to the location of - the composite file: - </P> -<PRE><implementation.python module="PythonModuleName" path="path/to/module"/> -</PRE> - <P>To instantiate a class instance and use a class-level function, the Python class must - have a default constructor (an __init__ method that takes no arguments besides - 'self') and the class attribute must be defined in the implementation.python element - in your composite, like so: - </P> -<PRE><implementation.python module="PythonModuleName" path="relative/path/to/module" class="PythonClassName"/> -</PRE> - <P>Tuscany currently only supports passing simple types (strings, ints, floats, etc) into - and out of Python components. Support for more complex types, such as Service Data Objects, - will be added in later releases. - </P> - <P>Additionally, Tuscany currently requires a componentType file that corresponds to the - name of the Python module, e.g. for the Python Calculator sample, the module name is - 'CalculatorImpl' and the componentType file is 'CalculatorImpl.componentType'. The - componentType file specifies what services are available on the component and which - references are called by the component. For example, CalculatorImpl.componentType - contains the following: - </P> -<PRE><componentType xmlns="http://www.osoa.org/xmlns/sca/1.0"> - <service name="CalculatorService"> - <interface.python/> - </service> - <reference name="divideService"> - <interface.python/> - </reference> -</componentType> -</PRE> - <A NAME="references"><H3>References</H3></A> - <P>References are automatically added to your Python component implementation when - the runtime loads the implementation script, so they can be used like so: - </P> -<PRE># The module-level div function -def div(val1, val2): - # Use the divideService reference - result = divideService.divide(val1, val2) - return result -</PRE> - <P>and in your composite file: - </P> -<PRE><component name="CalculatorComponent"> - <implementation.python module="CalculatorImpl"/> - <reference name="divideService">DivideComponent/DivideService</reference> -</component> -</PRE> - <A NAME="properties"><H3>Properties</H3></A> - <P>A composite with a property defined for a component like so: - </P> -<PRE><component name="DivideComponent"> - <implementation.python module="DivideImpl"/> - <property name="doRounding">true</property> -</component> -</PRE> - <P>and in the associated .componentType file like so: - </P> -<PRE><componentType ... -... - <property name="doRounding" type="xsd:boolean"/> -</componentType> -</PRE> - <P>means the property is automatically instantiated and assigned the - property value in the Python component implementation, so it can be - used like so: - </P> -<PRE>def divide(val1, val2): - result = float(val1) / float(val2) - print "Python - DivideImpl.divide " + str(val1) + " / " + str(val2) + " = " + str(result) - - # Use the doRounding property - if doRounding: - result = round(result) - print "Python - DivideImpl.divide is rounding the result to " + str(result) - - return result -</PRE> -</P> - </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> - |