服务器使用实例
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此使用实例可以将任意 UNO 组件导出为远程服务器。例如，使用 com.sun.star.io.Pipe 服务，它已由办公软件附带的组件实现。该服务导出 com.sun.star.io.XOutputStream 和 com.sun.star.io.XInputStream 接口。数据通过输出流写入管道，并且再次从输入流读取相同的数据。要将此组件导出为远程服务器，请切换到 <OfficePath>/program 目录并执行以下命令行。
i:\o641l\program>uno -s com.sun.star.io.Pipe -ro types.rdb -ro services.rdb -u uno:socket,host=0,port=2002;urp;test > accepting socket,host=0,port=2083...
现在客户端程序可以连接到服务器。客户端可能类似如下所示：
import com.sun.star.lang.XServiceInfo;
import com.sun.star.uno.XComponentContext;
import com.sun.star.bridge.XUnoUrlResolver;
import com.sun.star.io.XOutputStream;
import com.sun.star.io.XInputStream;
import com.sun.star.uno.UnoRuntime;
// Note: This example does not do anything meaningful, it shall just show,
// how to import an arbitrary UNO object from a remote process.
class UnoExeClient {
public static void main(String [] args) throws java.lang.Exception {
if (args.length != 1) {
System.out.println("Usage : java UnoExeClient uno-url");
System.out.println(" The imported object must support the com.sun.star.io.Pipe service");
return;
}
XComponentContext ctx =
com.sun.star.comp.helper.Bootstrap.createInitialComponentContext(null);
// get the UnoUrlResolver service
Object o = ctx.getServiceManager().createInstanceWithContext(
"com.sun.star.bridge.UnoUrlResolver" , ctx);
XUnoUrlResolver resolver = (XUnoUrlResolver) UnoRuntime.queryInterface(
XUnoUrlResolver.class, o);
// connect to the remote server and retrieve the appropriate object
o = resolver.resolve(args[0]);
// Check if we got what we expected
// Note: This is not really necessary, you can also use the try and error approach
XServiceInfo serviceInfo = (XServiceInfo) UnoRuntime.queryInterface(XServiceInfo.class,o);
if (serviceInfo == null) {
throw new com.sun.star.uno.RuntimeException(
"error: The object imported with " + args[0] + " did not support XServiceInfo", null);
}
if (!serviceInfo.supportsService("com.sun.star.io.Pipe")) {
throw new com.sun.star.uno.RuntimeException(
"error: The object imported with "+args[0]+" does not support the pipe service", null);
}
XOutputStream output = (XOutputStream) UnoRuntime.queryInterface(XOutputStream.class,o);
XInputStream input = (XInputStream) UnoRuntime.queryInterface(XInputStream.class,o);
// construct an array.
byte[] array = new byte[]{1,2,3,4,5};
// send it to the remote object
output.writeBytes(array);
output.closeOutput();
// now read it again in two blocks
byte [][] read = new byte[1][0];
System.out.println("Available bytes : " + input.available());
input.readBytes( read,2 );
System.out.println("read " + read[0].length + ":" + read[0][0] + "," + read[0][1]);
System.out.println("Available bytes : " + input.available());
input.readBytes(read,3);
System.out.println("read " + read[0].length + ":" + read[0][0] +
"," + read[0][1] + "," + read[0][2]);
System.out.println("Terminating client");
System.exit(0);
}
}
引导组件上下文后，UnoUrlResolver 服务被实例化以访问远程对象。解析远程对象后，请检查其是否真正支持 Pipe 服务。例如，尝试将此客户端连接到运行的 OpenOffice.org — 此检查将会失败。具有五个元素的 byte array 将被写入远程服务器，并使用两个 readBytes() 调用再次读取。使用以下命令行启动客户端可以连接到上面启动的服务器。您应获得以下输出：
I:\tmp>java UnoExeClient uno:socket,host=localhost,port=2083;urp;test Available bytes : 5 read 2:1,2 Available bytes : 3 read 3:3,4,5 Terminating client
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