如果想要一个免费，不使用Weblogic WTC JOLT，实现Java调用Tuxedo，那最容易想到的就是通过JNI，让Java执行native代码，实现对Tuxedo的调用。
环境：Suse 9 Tuxedo 8.1 Java1.4 $JAVA_HOME $TUXDIR
实现的步骤如下：
1. 编写带native方法的Java类
| /** * This is a demo class for test JNI * * @author STEELE * */ public class Hello { static { try { // "hello" means the library of native method System.loadLibrary("hello"); } catch (UnsatisfiedLinkError e) { System.err.println("Cannot load hello library:\n " + e.toString()); } } public Hello() { } // This is a native method without args and return public native void SayHello(); } |
2.编译为.class文件
javac Hello.java
3.生成.h文件
javah Hello
4.编写对应的C文件，我一般直接拷贝一个.h文件为.c，之后修改，感觉比较不会出错
| #include <stdio.h> #include "atmi.h" /* TUXEDO Header File */ /* DO NOT EDIT THIS FILE - it is machine generated */ #include <jni.h> /* Header for class Hello */ #ifndef _Included_Hello #define _Included_Hello #ifdef __cplusplus extern "C" { #endif /* * Class: Hello * Method: SayHello * Signature: ()V */ JNIEXPORT void JNICALL Java_Hello_SayHello (JNIEnv * env, jobject arg) { char *sendbuf, *rcvbuf; long sendlen, rcvlen; int ret; printf("THIS IS JNI Say Hello\n"); /* Attach to System/T as a Client Process */ if (tpinit((TPINIT *) NULL) == -1) { (void) fprintf(stderr, "Tpinit failed\n"); exit(1); } sendlen = 32; /* Allocate STRING buffers for the request and the reply */ if((sendbuf = (char *) tpalloc("STRING", NULL, sendlen+1)) == NULL) { (void) fprintf(stderr,"Error allocating send buffer\n"); tpterm(); exit(1); } if((rcvbuf = (char *) tpalloc("STRING", NULL, sendlen+1)) == NULL) { (void) fprintf(stderr,"Error allocating receive buffer\n"); tpfree(sendbuf); tpterm(); exit(1); } (void) strcpy(sendbuf, "0123456789abcdef0123456789abcdef"); /* Request the service TOUPPER, waiting for a reply */ ret = tpcall("TOUPPER", (char *)sendbuf, 0, (char **)&rcvbuf, &rcvlen, (long)0); if(ret == -1) { (void) fprintf(stderr, "Can't send request to service TOUPPER\n"); (void) fprintf(stderr, "Tperrno = %d\n", tperrno); tpfree(sendbuf); tpfree(rcvbuf); tpterm(); exit(1); } (void) fprintf(stdout, "Returned string is: %s\n", rcvbuf); /* Free Buffers & Detach from System/T */ tpfree(sendbuf); tpfree(rcvbuf); tpterm(); return; } #ifdef __cplusplus } #endif #endif |
