Tomcat example source code file (info.c)

This example Tomcat source code file (info.c) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Tomcat tags/keywords

declare_finfo_field, declare_finfo_field, get_finfo_i, get_finfo_j, j2p, n, n, null, null, set_finfo_i, set_finfo_j, tcn_implement_call, v, v

The Tomcat info.c source code

/* 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.
 */

/*
 *
 * @author Mladen Turk
 * @version $Revision: 466585 $, $Date: 2006-10-22 00:16:34 +0200 (dim., 22 oct. 2006) $
 */
 
#include "tcn.h"
#include "apr_file_io.h"

#define DECLARE_FINFO_FIELD(name) static jfieldID _fid##name = NULL
#define FINFO_FIELD(name)         _fid##name

#define GET_FINFO_I(N)      \
    _fid##N = (*e)->GetFieldID(e, finfo, #N, "I");  \
    if (_fid##N == NULL) {                          \
        (*e)->ExceptionClear(e);                    \
        goto cleanup;                               \
    } else (void)(0)

#define GET_FINFO_J(N)      \
    _fid##N = (*e)->GetFieldID(e, finfo, #N, "J");  \
    if (_fid##N == NULL) {                          \
        (*e)->ExceptionClear(e);                    \
        goto cleanup;                               \
    } else (void)(0)

#define GET_FINFO_S(N)      \
    _fid##N = (*e)->GetFieldID(e, finfo, #N,        \
                             "Ljava/lang/String;"); \
    if (_fid##N == NULL) {                          \
        (*e)->ExceptionClear(e);                    \
        goto cleanup;                               \
    } else (void)(0)

#define SET_FINFO_I(N, V)  \
    (*e)->SetIntField(e, obj, _fid##N, (jint)(V))

#define SET_FINFO_J(N, V)  \
    (*e)->SetLongField(e, obj, _fid##N, (jlong)(V))

#define SET_FINFO_S(N, V)                 \
    (*e)->SetObjectField(e, obj, _fid##N, \
        (V) ? AJP_TO_JSTRING((V)) : NULL)


#define DECLARE_AINFO_FIELD(name) static jfieldID _aid##name = NULL
#define AINFO_FIELD(name)         _aid##name

#define GET_AINFO_I(N)      \
    _aid##N = (*e)->GetFieldID(e, ainfo, #N, "I");  \
    if (_aid##N == NULL) {                          \
        (*e)->ExceptionClear(e);                    \
        goto cleanup;                               \
    } else (void)(0)

#define GET_AINFO_J(N)      \
    _aid##N = (*e)->GetFieldID(e, ainfo, #N, "J");  \
    if (_aid##N == NULL) {                          \
        (*e)->ExceptionClear(e);                    \
        goto cleanup;                               \
    } else (void)(0)

#define GET_AINFO_S(N)      \
    _aid##N = (*e)->GetFieldID(e, ainfo, #N,        \
                             "Ljava/lang/String;"); \
    if (_aid##N == NULL) {                          \
        (*e)->ExceptionClear(e);                    \
        goto cleanup;                               \
    } else (void)(0)

#define SET_AINFO_I(N, V)  \
    (*e)->SetIntField(e, obj, _aid##N, (jint)(V))

#define SET_AINFO_J(N, V)  \
    (*e)->SetLongField(e, obj, _aid##N, (jlong)(V))

#define SET_AINFO_S(N, V)                 \
    (*e)->SetObjectField(e, obj, _aid##N, \
        (V) ? AJP_TO_JSTRING((V)) : NULL)


DECLARE_FINFO_FIELD(pool);
DECLARE_FINFO_FIELD(valid);
DECLARE_FINFO_FIELD(protection);
DECLARE_FINFO_FIELD(filetype);
DECLARE_FINFO_FIELD(user);
DECLARE_FINFO_FIELD(group);
DECLARE_FINFO_FIELD(inode);
DECLARE_FINFO_FIELD(device);
DECLARE_FINFO_FIELD(nlink);
DECLARE_FINFO_FIELD(size);
DECLARE_FINFO_FIELD(csize);
DECLARE_FINFO_FIELD(atime);
DECLARE_FINFO_FIELD(mtime);
DECLARE_FINFO_FIELD(ctime);
DECLARE_FINFO_FIELD(fname);
DECLARE_FINFO_FIELD(name);
DECLARE_FINFO_FIELD(filehand);

DECLARE_AINFO_FIELD(pool);
DECLARE_AINFO_FIELD(hostname);
DECLARE_AINFO_FIELD(servname);
DECLARE_AINFO_FIELD(port);
DECLARE_AINFO_FIELD(family);
DECLARE_AINFO_FIELD(next);

static int finfo_class_initialized = 0;
static int ainfo_class_initialized = 0;
static jmethodID finfo_class_init = NULL;
static jmethodID ainfo_class_init = NULL;
static jclass finfo_class = NULL;
static jclass ainfo_class = NULL;

apr_status_t tcn_load_finfo_class(JNIEnv *e, jclass finfo)
{
    GET_FINFO_J(pool);
    GET_FINFO_I(valid);
    GET_FINFO_I(protection);
    GET_FINFO_I(filetype);
    GET_FINFO_I(user);
    GET_FINFO_I(group);
    GET_FINFO_I(inode);
    GET_FINFO_I(device);
    GET_FINFO_I(nlink);
    GET_FINFO_J(size);
    GET_FINFO_J(csize);
    GET_FINFO_J(atime);
    GET_FINFO_J(mtime);
    GET_FINFO_J(ctime);
    GET_FINFO_S(fname);
    GET_FINFO_S(name);
    GET_FINFO_J(filehand);
    
    finfo_class_init = (*e)->GetMethodID(e, finfo,
                                      "<init>", "()V");
    if (finfo_class_init == NULL)
        goto cleanup;
    finfo_class_initialized = 1;
    finfo_class = finfo;
cleanup:
    return APR_SUCCESS;
}

apr_status_t tcn_load_ainfo_class(JNIEnv *e, jclass ainfo)
{
    GET_AINFO_J(pool);
    GET_AINFO_S(hostname);
    GET_AINFO_S(servname);
    GET_AINFO_I(port);
    GET_AINFO_I(family);
    GET_AINFO_J(next);
    ainfo_class_init = (*e)->GetMethodID(e, ainfo,
                                      "<init>", "()V");

    if (ainfo_class_init == NULL)
        goto cleanup;
    ainfo_class_initialized = 1;
    ainfo_class = ainfo;
cleanup:
    return APR_SUCCESS;
}

static void fill_finfo(JNIEnv *e, jobject obj, apr_finfo_t *info)
{

    SET_FINFO_J(pool, P2J(info->pool));
    SET_FINFO_I(valid, info->valid);
    SET_FINFO_I(protection, info->protection);
    SET_FINFO_I(filetype, info->filetype);
    SET_FINFO_I(user, ((jlong)info->user));
    SET_FINFO_I(group, ((jlong)info->group));
    SET_FINFO_I(inode, info->inode);
    SET_FINFO_I(device, info->device);
    SET_FINFO_I(nlink, info->nlink);
    SET_FINFO_J(size, info->size);
    SET_FINFO_J(csize, info->csize);
    SET_FINFO_J(atime, info->atime);
    SET_FINFO_J(mtime, info->mtime);
    SET_FINFO_J(ctime, info->ctime);
    SET_FINFO_S(fname, info->fname);
    SET_FINFO_S(name, info->name);
    SET_FINFO_J(filehand, P2J(info->filehand));
}

static void fill_ainfo(JNIEnv *e, jobject obj, apr_sockaddr_t *info)
{

    SET_AINFO_J(pool, P2J(info->pool));
    SET_AINFO_S(hostname, info->hostname);
    SET_AINFO_S(servname, info->servname);
    SET_AINFO_I(port, info->port);
    SET_AINFO_I(family, info->family);
    SET_AINFO_J(next, P2J(info->next));

}

TCN_IMPLEMENT_CALL(jint, File, stat)(TCN_STDARGS, jobject finfo,
                                     jstring fname, jint wanted,
                                     jlong pool)
{
    apr_pool_t *p = J2P(pool, apr_pool_t *);
    TCN_ALLOC_CSTRING(fname);
    apr_status_t rv;
    apr_finfo_t info;

    UNREFERENCED(o);

    if ((rv =  apr_stat(&info, J2S(fname), wanted, p)) == APR_SUCCESS) {
        jobject io = (*e)->NewLocalRef(e, finfo);
        fill_finfo(e, io, &info);
        (*e)->DeleteLocalRef(e, io);
    }
    TCN_FREE_CSTRING(fname);
    return (jint)rv;
}

TCN_IMPLEMENT_CALL(jobject, File, getStat)(TCN_STDARGS, jstring fname,
                                           jint wanted, jlong pool)
{
    apr_pool_t *p = J2P(pool, apr_pool_t *);
    TCN_ALLOC_CSTRING(fname);
    apr_status_t rv;
    apr_finfo_t info;
    jobject finfo = NULL;

    UNREFERENCED(o);

    if ((rv =  apr_stat(&info, J2S(fname), wanted, p)) == APR_SUCCESS) {
        finfo = (*e)->NewObject(e, finfo_class, finfo_class_init);
        if (finfo == NULL)
            goto cleanup;
        fill_finfo(e, finfo, &info);
    }
    else
        tcn_ThrowAPRException(e, rv);
cleanup:
    TCN_FREE_CSTRING(fname);
    return finfo;
}

TCN_IMPLEMENT_CALL(jint, File, infoGet)(TCN_STDARGS, jobject finfo,
                                        jint wanted, jlong file)
{
    apr_file_t *f = J2P(file, apr_file_t *);
    apr_status_t rv;
    apr_finfo_t info;

    UNREFERENCED(o);

    if ((rv =  apr_file_info_get(&info, wanted, f)) == APR_SUCCESS) {
        jobject io = (*e)->NewLocalRef(e, finfo);
        fill_finfo(e, io, &info);
        (*e)->DeleteLocalRef(e, io);
    }
    return (jint)rv;
}

TCN_IMPLEMENT_CALL(jobject, File, getInfo)(TCN_STDARGS, jint wanted, jlong file)
{
    apr_file_t *f = J2P(file, apr_file_t *);
    apr_status_t rv;
    apr_finfo_t  info;

    UNREFERENCED(o);

    if ((rv =  apr_file_info_get(&info, wanted, f)) == APR_SUCCESS) {
        jobject finfo;
        finfo = (*e)->NewObject(e, finfo_class, finfo_class_init);
        if (finfo == NULL)
            return NULL;
        fill_finfo(e, finfo, &info);
        return finfo;
    }
    else
        tcn_ThrowAPRException(e, rv);
    return NULL;
}

TCN_IMPLEMENT_CALL(jint, Directory, read)(TCN_STDARGS, jobject finfo,
                                          jint wanted, jlong dir)
{
    apr_dir_t *d = J2P(dir, apr_dir_t *);
    apr_status_t rv;
    apr_finfo_t info;

    UNREFERENCED(o);

    if ((rv =  apr_dir_read(&info, wanted, d)) == APR_SUCCESS) {
        jobject io = (*e)->NewLocalRef(e, finfo);
        fill_finfo(e, io, &info);
        if ((*e)->ExceptionCheck(e)) {
            (*e)->ExceptionClear(e);
        }
        else
            rv = APR_EGENERAL;
        (*e)->DeleteLocalRef(e, io);
    }
    return (jint)rv;
}

TCN_IMPLEMENT_CALL(jboolean, Address, fill)(TCN_STDARGS,
                                            jobject addr, jlong info)
{
    apr_sockaddr_t *i = J2P(info, apr_sockaddr_t *);
    jobject ao;
    jboolean rv = JNI_FALSE;

    UNREFERENCED(o);

    if (i) {
        ao = (*e)->NewLocalRef(e, addr);
        fill_ainfo(e, ao, i);
        if ((*e)->ExceptionCheck(e)) {
            (*e)->ExceptionClear(e);
        }
        else
            rv = JNI_TRUE;
        (*e)->DeleteLocalRef(e, ao);
    }
    return rv;
}

TCN_IMPLEMENT_CALL(jobject, Address, getInfo)(TCN_STDARGS, jlong info)
{
    apr_sockaddr_t *i = J2P(info, apr_sockaddr_t *);
    jobject sockaddrObj = NULL;

    UNREFERENCED(o);

    /* Create the APR Error object */
    sockaddrObj = (*e)->NewObject(e, ainfo_class, ainfo_class_init);
    if (sockaddrObj == NULL)
        return NULL;
    fill_ainfo(e, sockaddrObj, i);
    return sockaddrObj;
}