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# Building
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Before building you should install swig and java.
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From the root directory of the libiec61850 project you have to build some of the dependant libraries
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> cd ..
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>
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> make clean
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>
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> make INSTALL_PREFIX=/usr/local install
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>
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> make clean
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>
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> make INSTALL_PREFIX=/usr/local dynlib
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Now change into the Java project subdirectory
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> cd javaiec61850
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>
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> swig -java -I/usr/local/include iec61850.i
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>
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> gcc -fpic -I/usr/lib/jvm/default-java/include -I/usr/lib/jvm/default-java/include/linux -c iec61850_wrap.c
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>
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> ld -shared ../build/libiec61850.so iec61850_wrap.o -o libiec61850.so
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>
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> javac test_javaiec61850.java
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>
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> java test_javaiec61850
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This test programme should show an out put of
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```sh
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MyThread for IEC61850Server has STARTED
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IEC61850Server has STARTED
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IEC61850Client has connected to the IEC61850Server
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IEC61850Client has read testmodelSENSORS
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IEC61850Client caught a error = 0
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IEC61850Client read a temperature set point of = 0.0
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IEC61850Client read a temperature set point of = 10.0
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IEC61850Server has been Interrupted and STOPPED
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```
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The CMakeLists file does not exist yet, however it would be a nice to have a build of the java bindings by turning on a BUILD\_JAVA\_BINDINGS flag in CMake from cmake-gui or in command line:
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```sh
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$ cmake -DBUILD_JAVA_BINDINGS=ON .
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```
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Then compile the library and install it.
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javaiec61850 library is to be imported calling
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```java
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import iec61850
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```
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# Client tutorial
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The java bindings works similarly to the python and basic C library ones.
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Have a look at the Client, Server and test programme.
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For example to create a connection, call:
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```java
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if (con == null) {
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con = iec61850.IedConnection_create();
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}
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iec61850.IedConnection_connect(con, error, "localhost", tcpPort);
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conState = iec61850.IedConnection_getState(con);
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if ( conState.toString() == "IED_STATE_CONNECTED" || conState.toString() == "IED_STATE_IDLE") {
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System.out.println("IEC61850Client has connected to the IEC61850Server" );
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}
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```
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Copyright Waterford Institute of Technology 2017~2019, Telecommunications Software and Systems Group (TSSG), Author Miguel Ponce de Leon <miguelpdl@tssg.org>
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This work is supported by European Union’s Horizon 2020 research and innovation programme under grant agreement No 727481, project RE-SERVE (Re- newables in a Stable Electric Grid)
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