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Tomcat example source code file (Procattr.java)

This example Tomcat source code file (Procattr.java) 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

error, error, object, object, procattr, procattr, string, string

The Tomcat Procattr.java 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.
 */

package org.apache.tomcat.jni;

/** Procattr
 *
 * @author Mladen Turk
 * @version $Revision: 467222 $, $Date: 2006-10-24 05:17:11 +0200 (mar., 24 oct. 2006) $
 */

public class Procattr {

    /**
     * Create and initialize a new procattr variable
     * @param cont The pool to use
     * @return The newly created procattr.
     */
    public static native long create(long cont)
        throws Error;

    /**
     * Determine if any of stdin, stdout, or stderr should be linked to pipes
     * when starting a child process.
     * @param attr The procattr we care about.
     * @param in Should stdin be a pipe back to the parent?
     * @param out Should stdout be a pipe back to the parent?
     * @param err Should stderr be a pipe back to the parent?
     */
    public static native int ioSet(long attr, int in, int out, int err);
    /**
     * Set the child_in and/or parent_in values to existing apr_file_t values.
     * <br />
     * This is NOT a required initializer function. This is
     * useful if you have already opened a pipe (or multiple files)
     * that you wish to use, perhaps persistently across multiple
     * process invocations - such as a log file. You can save some
     * extra function calls by not creating your own pipe since this
     * creates one in the process space for you.
     * @param attr The procattr we care about.
     * @param in apr_file_t value to use as child_in. Must be a valid file.
     * @param parent apr_file_t value to use as parent_in. Must be a valid file.
     */
    public static native int childInSet(long attr, long in, long parent);

    /**
     * Set the child_out and parent_out values to existing apr_file_t values.
     * <br />
     * This is NOT a required initializer function. This is
     * useful if you have already opened a pipe (or multiple files)
     * that you wish to use, perhaps persistently across multiple
     * process invocations - such as a log file.
     * @param attr The procattr we care about.
     * @param out apr_file_t value to use as child_out. Must be a valid file.
     * @param parent apr_file_t value to use as parent_out. Must be a valid file.
     */
    public static native int childOutSet(long attr, long out, long parent);

    /**
     * Set the child_err and parent_err values to existing apr_file_t values.
     * <br />
     * This is NOT a required initializer function. This is
     * useful if you have already opened a pipe (or multiple files)
     * that you wish to use, perhaps persistently across multiple
     * process invocations - such as a log file.
     * @param attr The procattr we care about.
     * @param err apr_file_t value to use as child_err. Must be a valid file.
     * @param parent apr_file_t value to use as parent_err. Must be a valid file.
     */
    public static native int childErrSet(long attr, long err, long parent);

    /**
     * Set which directory the child process should start executing in.
     * @param attr The procattr we care about.
     * @param dir Which dir to start in.  By default, this is the same dir as
     *            the parent currently resides in, when the createprocess call
     *            is made.
     */
    public static native int dirSet(long attr, String dir);

    /**
     * Set what type of command the child process will call.
     * @param attr The procattr we care about.
     * @param cmd The type of command.  One of:
     * <PRE>
     * APR_SHELLCMD     --  Anything that the shell can handle
     * APR_PROGRAM      --  Executable program   (default)
     * APR_PROGRAM_ENV  --  Executable program, copy environment
     * APR_PROGRAM_PATH --  Executable program on PATH, copy env
     * </PRE>
     */
    public static native int cmdtypeSet(long attr, int cmd);

    /**
     * Determine if the child should start in detached state.
     * @param attr The procattr we care about.
     * @param detach Should the child start in detached state?  Default is no.
     */
    public static native int detachSet(long attr, int detach);

    /**
     * Specify that apr_proc_create() should do whatever it can to report
     * failures to the caller of apr_proc_create(), rather than find out in
     * the child.
     * @param attr The procattr describing the child process to be created.
     * @param chk Flag to indicate whether or not extra work should be done
     *            to try to report failures to the caller.
     * <br />
     * This flag only affects apr_proc_create() on platforms where
     * fork() is used.  This leads to extra overhead in the calling
     * process, but that may help the application handle such
     * errors more gracefully.
     */
    public static native int errorCheckSet(long attr, int chk);

    /**
     * Determine if the child should start in its own address space or using the
     * current one from its parent
     * @param attr The procattr we care about.
     * @param addrspace Should the child start in its own address space?  Default
     * is no on NetWare and yes on other platforms.
     */
    public static native int addrspaceSet(long attr, int addrspace);

    /**
     * Specify an error function to be called in the child process if APR
     * encounters an error in the child prior to running the specified program.
     * @param attr The procattr describing the child process to be created.
     * @param pool The the pool to use.
     * @param o The Object to call in the child process.
     * <br />
     * At the present time, it will only be called from apr_proc_create()
     * on platforms where fork() is used.  It will never be called on other
     * platforms, on those platforms apr_proc_create() will return the error
     * in the parent process rather than invoke the callback in the now-forked
     * child process.
     */
    public static native void errfnSet(long attr, long pool, Object o);

    /**
     * Set the username used for running process
     * @param attr The procattr we care about.
     * @param username The username used
     * @param password User password if needed. Password is needed on WIN32
     *                 or any other platform having
     *                 APR_PROCATTR_USER_SET_REQUIRES_PASSWORD set.
     */
    public static native int userSet(long attr, String username, String password);

    /**
     * Set the group used for running process
     * @param attr The procattr we care about.
     * @param groupname The group name  used
     */
    public static native int groupSet(long attr, String groupname);


}

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