src/server/plugins/java/jvm.c

Tue, 09 Aug 2022 19:01:54 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Tue, 09 Aug 2022 19:01:54 +0200
branch
webdav
changeset 367
1592224f6059
parent 84
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child 415
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permissions
-rw-r--r--

add support for name/value config args

84
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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2013 Olaf Wintermann. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29 #include <stdio.h>
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30 #include <stdlib.h>
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31 #include <dlfcn.h>
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32
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33 #include <ucx/map.h>
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34
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35 #include "jvm.h"
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36 #include "daemon/request.h"
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37
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38 #ifdef __i386
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39 #define LIBJVM "/usr/java/jre/lib/i386/server/libjvm.so"
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40 #else
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41
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42 #endif
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43
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44 static JNIEnv *env = NULL;
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45 static JavaVM *jvm = NULL;
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46
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47 static jobject plugin_instance = NULL;
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48 static jmethodID load_jmodules_method = NULL;
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49 static jmethodID exec_method = NULL;
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50
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51 int jvm_init(pblock *pb, Session *sn, Request *rq) {
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52 // load lib
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53 void *lib = dlopen(LIBJVM, RTLD_GLOBAL | RTLD_NOW);
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54 if(!lib) {
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55 log_ereport(LOG_FAILURE, "Cannot load libjvm.so");
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56 return REQ_ABORTED;
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57 }
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58
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59 // get symbol
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60 void *sym = dlsym(lib, "JNI_CreateJavaVM");
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61 if(sym == NULL) {
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62 log_ereport(
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63 LOG_FAILURE,
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64 "Cannot get symbol JNI_CreateJavaVM from lib");
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65 return REQ_ABORTED;
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66 }
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67
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68 // create JVM
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69 JavaVMInitArgs vm_args;
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70 JavaVMOption options[2];
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71 options[0].optionString = "-Djava.class.path=lib/wsrt.jar";
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72 options[1].optionString = "-Djava.library.path=lib/";
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73 vm_args.version = JNI_VERSION_1_6;
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74 vm_args.options = options;
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75 vm_args.nOptions = 2;
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76 vm_args.ignoreUnrecognized = JNI_TRUE;
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77
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78 CreateJVMFunc create_jvm = (CreateJVMFunc)sym;
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79 if(create_jvm(&jvm, (void**)&env, &vm_args)) {
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80 dlclose(lib);
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81 log_ereport(LOG_FAILURE, "Cannot create JVM");
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82 }
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83
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84 // load classes and methods
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85 jclass cls = (*env)->FindClass(env, "webserver/ServerPlugin");
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86 if(!cls) {
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87 log_ereport(
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88 LOG_FAILURE,
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89 "jvm-init: missing or broken wsrt.jar");
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90 log_ereport(
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91 LOG_FAILURE,
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92 "jvm-init: missing class webserver.ServerPlugin");
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93 return REQ_ABORTED;
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94 }
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95
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96 jmethodID constr = (*env)->GetMethodID(env, cls, "<init>", "()V");
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97 if(!constr) {
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98 log_ereport(
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99 LOG_FAILURE,
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100 "jvm-init: missing or broken wsrt.jar");
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101 log_ereport(
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102 LOG_FAILURE,
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103 "jvm-init: missing constructor");
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104 return REQ_ABORTED;
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105 }
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106 plugin_instance = (*env)->NewObject(env, cls, constr);
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107 if(!plugin_instance) {
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108 log_ereport(
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109 LOG_FAILURE,
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110 "jvm-init: cannot create ServerPlugin instance");
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111 return REQ_ABORTED;
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112 }
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113
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114 // methods
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115 load_jmodules_method = (*env)->GetMethodID(
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116 env,
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117 cls,
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118 "loadModule",
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119 "(Ljava/lang/String;Ljava/lang/String;)I");
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120 if(!load_jmodules_method) {
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121 log_ereport(LOG_FAILURE, "jvm-init: missing or broken wsrt.jar");
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122 log_ereport(LOG_FAILURE, "jvm-init: missing method (loadModule)");
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123 return REQ_ABORTED;
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124 }
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125
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126 exec_method = (*env)->GetMethodID(
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127 env,
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128 cls,
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129 "exec",
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130 "(I)I");
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131 if(!exec_method) {
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132 log_ereport(LOG_FAILURE, "jvm-init: missing or broken wsrt.jar");
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133 log_ereport(LOG_FAILURE, "jvm-init: missing method (exec)");
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134 return REQ_ABORTED;
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135 }
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136
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137
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138 return REQ_PROCEED;
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139 }
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140
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141 int load_jmodules(pblock *pb, Session *sn, Request *rq) {
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142 char *jar = pblock_findval("jar", pb);
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143 char *classes = pblock_findval("classes", pb);
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144
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145 if(!jar || !classes) {
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146 log_ereport(
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147 LOG_MISCONFIG,
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148 "load-jmodule: missing parameters (jar, classes)");
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149 return REQ_ABORTED;
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150 }
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151
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152 // check jvm
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153 if(!plugin_instance) {
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154 log_ereport(
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155 LOG_FAILURE,
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156 "load-jmodules: java plugin not properly loaded");
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157 return REQ_ABORTED;
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158 }
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159 if(!load_jmodules_method) {
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160 log_ereport(
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161 LOG_FAILURE,
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162 "load-jmodules: java plugin not properly loaded");
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163 return REQ_ABORTED;
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164 }
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165
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166 // load java module
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167 jstring jar_param = (*env)->NewStringUTF(env, jar);
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168 jstring classes_param = (*env)->NewStringUTF(env, classes);
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169
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170 jint ret = (*env)->CallIntMethod(
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171 env,
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172 plugin_instance,
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173 load_jmodules_method,
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174 jar_param,
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175 classes_param);
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176
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177 // free stuff
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178 (*env)->DeleteLocalRef(env, jar_param);
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179 (*env)->DeleteLocalRef(env, classes_param);
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180
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181 return ret;
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182 }
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183
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184 int jexec(pblock *pb, Session *sn, Request *rq) {
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185 return REQ_NOACTION;
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186 }
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187
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188 int jvm_method_exec(FuncStruct *func, pblock *pb, Session *sn, Request *rq) {
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189 printf("jvm_method_exec: %d\n", func);
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190 NSAPIRequest *nrq = (NSAPIRequest*)rq;
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191
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192 JNIEnv *e = NULL;
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193 int r = (*jvm)->AttachCurrentThread(jvm, (void**)&e, NULL);
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194
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195 jint index = (jint)func->exec_data;
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196 printf("(C) exec: %d\n", index);
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197
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198 jint ret = (*env)->CallIntMethod(
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199 env,
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200 plugin_instance,
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201 exec_method,
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202 index);
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203
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204 return ret;
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205 }
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206

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