mirror of
https://github.com/MariaDB/server.git
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Changes to create storage directory for storage engines.
This commit is contained in:
brian@zim.(none)
890
storage/bdb/libdb_java/java_util.c
Normal file
890
storage/bdb/libdb_java/java_util.c
Normal file
@@ -0,0 +1,890 @@
|
||||
/*-
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* See the file LICENSE for redistribution information.
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||||
*
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* Copyright (c) 1997-2002
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* Sleepycat Software. All rights reserved.
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||||
*/
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||||
#include "db_config.h"
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#ifndef lint
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static const char revid[] = "$Id: java_util.c,v 11.49 2002/09/13 03:09:30 mjc Exp $";
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#endif /* not lint */
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#include <jni.h>
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#include <errno.h>
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#include "db_int.h"
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#include "java_util.h"
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#ifdef DB_WIN32
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#define sys_errlist _sys_errlist
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#define sys_nerr _sys_nerr
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#endif
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const char * const name_DB = "Db";
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const char * const name_DB_BTREE_STAT = "DbBtreeStat";
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const char * const name_DBC = "Dbc";
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const char * const name_DB_DEADLOCK_EX = "DbDeadlockException";
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||||
const char * const name_DB_ENV = "DbEnv";
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||||
const char * const name_DB_EXCEPTION = "DbException";
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const char * const name_DB_HASH_STAT = "DbHashStat";
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const char * const name_DB_LOCK = "DbLock";
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const char * const name_DB_LOCK_STAT = "DbLockStat";
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const char * const name_DB_LOCKNOTGRANTED_EX = "DbLockNotGrantedException";
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const char * const name_DB_LOGC = "DbLogc";
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const char * const name_DB_LOG_STAT = "DbLogStat";
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const char * const name_DB_LSN = "DbLsn";
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const char * const name_DB_MEMORY_EX = "DbMemoryException";
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const char * const name_DB_MPOOL_FSTAT = "DbMpoolFStat";
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const char * const name_DB_MPOOL_STAT = "DbMpoolStat";
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const char * const name_DB_PREPLIST = "DbPreplist";
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const char * const name_DB_QUEUE_STAT = "DbQueueStat";
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const char * const name_DB_REP_STAT = "DbRepStat";
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const char * const name_DB_RUNRECOVERY_EX = "DbRunRecoveryException";
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const char * const name_DBT = "Dbt";
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const char * const name_DB_TXN = "DbTxn";
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const char * const name_DB_TXN_STAT = "DbTxnStat";
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const char * const name_DB_TXN_STAT_ACTIVE = "DbTxnStat$Active";
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const char * const name_DB_UTIL = "DbUtil";
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const char * const name_DbAppendRecno = "DbAppendRecno";
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const char * const name_DbBtreeCompare = "DbBtreeCompare";
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const char * const name_DbBtreePrefix = "DbBtreePrefix";
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const char * const name_DbDupCompare = "DbDupCompare";
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const char * const name_DbEnvFeedback = "DbEnvFeedback";
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const char * const name_DbErrcall = "DbErrcall";
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const char * const name_DbHash = "DbHash";
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const char * const name_DbLockRequest = "DbLockRequest";
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const char * const name_DbFeedback = "DbFeedback";
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const char * const name_DbRecoveryInit = "DbRecoveryInit";
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const char * const name_DbRepTransport = "DbRepTransport";
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const char * const name_DbSecondaryKeyCreate = "DbSecondaryKeyCreate";
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const char * const name_DbTxnRecover = "DbTxnRecover";
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const char * const name_RepElectResult = "DbEnv$RepElectResult";
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const char * const name_RepProcessMessage = "DbEnv$RepProcessMessage";
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const char * const string_signature = "Ljava/lang/String;";
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jfieldID fid_Dbt_data;
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jfieldID fid_Dbt_offset;
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jfieldID fid_Dbt_size;
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jfieldID fid_Dbt_ulen;
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jfieldID fid_Dbt_dlen;
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jfieldID fid_Dbt_doff;
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jfieldID fid_Dbt_flags;
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jfieldID fid_Dbt_private_dbobj_;
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||||
jfieldID fid_Dbt_must_create_data;
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jfieldID fid_DbLockRequest_op;
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jfieldID fid_DbLockRequest_mode;
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jfieldID fid_DbLockRequest_timeout;
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jfieldID fid_DbLockRequest_obj;
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jfieldID fid_DbLockRequest_lock;
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jfieldID fid_RepProcessMessage_envid;
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||||
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||||
/****************************************************************
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||||
*
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||||
* Utility functions used by "glue" functions.
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||||
*/
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||||
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||||
/*
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||||
* Do any one time initialization, especially initializing any
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||||
* unchanging methodIds, fieldIds, etc.
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||||
*/
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||||
void one_time_init(JNIEnv *jnienv)
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||||
{
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||||
jclass cl;
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||||
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||||
if ((cl = get_class(jnienv, name_DBT)) == NULL)
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||||
return; /* An exception has been posted. */
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||||
fid_Dbt_data = (*jnienv)->GetFieldID(jnienv, cl, "data", "[B");
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||||
fid_Dbt_offset = (*jnienv)->GetFieldID(jnienv, cl, "offset", "I");
|
||||
fid_Dbt_size = (*jnienv)->GetFieldID(jnienv, cl, "size", "I");
|
||||
fid_Dbt_ulen = (*jnienv)->GetFieldID(jnienv, cl, "ulen", "I");
|
||||
fid_Dbt_dlen = (*jnienv)->GetFieldID(jnienv, cl, "dlen", "I");
|
||||
fid_Dbt_doff = (*jnienv)->GetFieldID(jnienv, cl, "doff", "I");
|
||||
fid_Dbt_flags = (*jnienv)->GetFieldID(jnienv, cl, "flags", "I");
|
||||
fid_Dbt_must_create_data = (*jnienv)->GetFieldID(jnienv, cl,
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"must_create_data", "Z");
|
||||
fid_Dbt_private_dbobj_ =
|
||||
(*jnienv)->GetFieldID(jnienv, cl, "private_dbobj_", "J");
|
||||
|
||||
if ((cl = get_class(jnienv, name_DbLockRequest)) == NULL)
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||||
return; /* An exception has been posted. */
|
||||
fid_DbLockRequest_op = (*jnienv)->GetFieldID(jnienv, cl, "op", "I");
|
||||
fid_DbLockRequest_mode = (*jnienv)->GetFieldID(jnienv, cl, "mode", "I");
|
||||
fid_DbLockRequest_timeout =
|
||||
(*jnienv)->GetFieldID(jnienv, cl, "timeout", "I");
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||||
fid_DbLockRequest_obj = (*jnienv)->GetFieldID(jnienv, cl, "obj",
|
||||
"Lcom/sleepycat/db/Dbt;");
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||||
fid_DbLockRequest_lock = (*jnienv)->GetFieldID(jnienv, cl, "lock",
|
||||
"Lcom/sleepycat/db/DbLock;");
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||||
|
||||
if ((cl = get_class(jnienv, name_RepProcessMessage)) == NULL)
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||||
return; /* An exception has been posted. */
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||||
fid_RepProcessMessage_envid =
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||||
(*jnienv)->GetFieldID(jnienv, cl, "envid", "I");
|
||||
}
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||||
|
||||
/*
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||||
* Get the private data from a Db* object that points back to a C DB_* object.
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||||
* The private data is stored in the object as a Java long (64 bits),
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||||
* which is long enough to store a pointer on current architectures.
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||||
*/
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||||
void *get_private_dbobj(JNIEnv *jnienv, const char *classname,
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||||
jobject obj)
|
||||
{
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||||
jclass dbClass;
|
||||
jfieldID id;
|
||||
long_to_ptr lp;
|
||||
|
||||
if (!obj)
|
||||
return (0);
|
||||
|
||||
if ((dbClass = get_class(jnienv, classname)) == NULL)
|
||||
return (NULL); /* An exception has been posted. */
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||||
id = (*jnienv)->GetFieldID(jnienv, dbClass, "private_dbobj_", "J");
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||||
lp.java_long = (*jnienv)->GetLongField(jnienv, obj, id);
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||||
return (lp.ptr);
|
||||
}
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||||
|
||||
/*
|
||||
* Set the private data in a Db* object that points back to a C DB_* object.
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||||
* The private data is stored in the object as a Java long (64 bits),
|
||||
* which is long enough to store a pointer on current architectures.
|
||||
*/
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||||
void set_private_dbobj(JNIEnv *jnienv, const char *classname,
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||||
jobject obj, void *value)
|
||||
{
|
||||
long_to_ptr lp;
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||||
jclass dbClass;
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||||
jfieldID id;
|
||||
|
||||
lp.java_long = 0; /* no junk in case sizes mismatch */
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||||
lp.ptr = value;
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||||
if ((dbClass = get_class(jnienv, classname)) == NULL)
|
||||
return; /* An exception has been posted. */
|
||||
id = (*jnienv)->GetFieldID(jnienv, dbClass, "private_dbobj_", "J");
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||||
(*jnienv)->SetLongField(jnienv, obj, id, lp.java_long);
|
||||
}
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||||
|
||||
/*
|
||||
* Get the private data in a Db/DbEnv object that holds additional 'side data'.
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||||
* The private data is stored in the object as a Java long (64 bits),
|
||||
* which is long enough to store a pointer on current architectures.
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||||
*/
|
||||
void *get_private_info(JNIEnv *jnienv, const char *classname,
|
||||
jobject obj)
|
||||
{
|
||||
jclass dbClass;
|
||||
jfieldID id;
|
||||
long_to_ptr lp;
|
||||
|
||||
if (!obj)
|
||||
return (NULL);
|
||||
|
||||
if ((dbClass = get_class(jnienv, classname)) == NULL)
|
||||
return (NULL); /* An exception has been posted. */
|
||||
id = (*jnienv)->GetFieldID(jnienv, dbClass, "private_info_", "J");
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||||
lp.java_long = (*jnienv)->GetLongField(jnienv, obj, id);
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||||
return (lp.ptr);
|
||||
}
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||||
|
||||
/*
|
||||
* Set the private data in a Db/DbEnv object that holds additional 'side data'.
|
||||
* The private data is stored in the object as a Java long (64 bits),
|
||||
* which is long enough to store a pointer on current architectures.
|
||||
*/
|
||||
void set_private_info(JNIEnv *jnienv, const char *classname,
|
||||
jobject obj, void *value)
|
||||
{
|
||||
long_to_ptr lp;
|
||||
jclass dbClass;
|
||||
jfieldID id;
|
||||
|
||||
lp.java_long = 0; /* no junk in case sizes mismatch */
|
||||
lp.ptr = value;
|
||||
if ((dbClass = get_class(jnienv, classname)) == NULL)
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||||
return; /* An exception has been posted. */
|
||||
id = (*jnienv)->GetFieldID(jnienv, dbClass, "private_info_", "J");
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||||
(*jnienv)->SetLongField(jnienv, obj, id, lp.java_long);
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||||
}
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||||
|
||||
/*
|
||||
* Given a non-qualified name (e.g. "foo"), get the class handle
|
||||
* for the fully qualified name (e.g. "com.sleepycat.db.foo")
|
||||
*/
|
||||
jclass get_class(JNIEnv *jnienv, const char *classname)
|
||||
{
|
||||
/*
|
||||
* Note: PERFORMANCE: It should be possible to cache jclass's.
|
||||
* If we do a NewGlobalRef on each one, we can keep them
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||||
* around in a table. A jclass is a jobject, and
|
||||
* since NewGlobalRef returns a jobject, it isn't
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||||
* technically right, but it would likely work with
|
||||
* most implementations. Possibly make it configurable.
|
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*/
|
||||
char fullname[128];
|
||||
|
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(void)snprintf(fullname, sizeof(fullname),
|
||||
"%s%s", DB_PACKAGE_NAME, classname);
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return ((*jnienv)->FindClass(jnienv, fullname));
|
||||
}
|
||||
|
||||
/*
|
||||
* Given a fully qualified name (e.g. "java.util.Hashtable")
|
||||
* return the jclass object. If it can't be found, an
|
||||
* exception is raised and NULL is return.
|
||||
* This is appropriate to be used for classes that may
|
||||
* not be present.
|
||||
*/
|
||||
jclass get_fully_qualified_class(JNIEnv *jnienv, const char *classname)
|
||||
{
|
||||
jclass result;
|
||||
|
||||
result = ((*jnienv)->FindClass(jnienv, classname));
|
||||
if (result == NULL) {
|
||||
jclass cnfe;
|
||||
char message[1024];
|
||||
|
||||
cnfe = (*jnienv)->FindClass(jnienv,
|
||||
"java/lang/ClassNotFoundException");
|
||||
strncpy(message, classname, sizeof(message));
|
||||
strncat(message, ": class not found", sizeof(message));
|
||||
(*jnienv)->ThrowNew(jnienv, cnfe, message);
|
||||
}
|
||||
return (result);
|
||||
}
|
||||
|
||||
/*
|
||||
* Set an individual field in a Db* object.
|
||||
* The field must be a DB object type.
|
||||
*/
|
||||
void set_object_field(JNIEnv *jnienv, jclass class_of_this,
|
||||
jobject jthis, const char *object_classname,
|
||||
const char *name_of_field, jobject obj)
|
||||
{
|
||||
char signature[512];
|
||||
jfieldID id;
|
||||
|
||||
(void)snprintf(signature, sizeof(signature),
|
||||
"L%s%s;", DB_PACKAGE_NAME, object_classname);
|
||||
id = (*jnienv)->GetFieldID(
|
||||
jnienv, class_of_this, name_of_field, signature);
|
||||
(*jnienv)->SetObjectField(jnienv, jthis, id, obj);
|
||||
}
|
||||
|
||||
/*
|
||||
* Set an individual field in a Db* object.
|
||||
* The field must be an integer type.
|
||||
*/
|
||||
void set_int_field(JNIEnv *jnienv, jclass class_of_this,
|
||||
jobject jthis, const char *name_of_field, jint value)
|
||||
{
|
||||
jfieldID id =
|
||||
(*jnienv)->GetFieldID(jnienv, class_of_this, name_of_field, "I");
|
||||
(*jnienv)->SetIntField(jnienv, jthis, id, value);
|
||||
}
|
||||
|
||||
/*
|
||||
* Set an individual field in a Db* object.
|
||||
* The field must be an integer type.
|
||||
*/
|
||||
void set_long_field(JNIEnv *jnienv, jclass class_of_this,
|
||||
jobject jthis, const char *name_of_field, jlong value)
|
||||
{
|
||||
jfieldID id = (*jnienv)->GetFieldID(jnienv, class_of_this,
|
||||
name_of_field, "J");
|
||||
(*jnienv)->SetLongField(jnienv, jthis, id, value);
|
||||
}
|
||||
|
||||
/*
|
||||
* Set an individual field in a Db* object.
|
||||
* The field must be an integer type.
|
||||
*/
|
||||
void set_lsn_field(JNIEnv *jnienv, jclass class_of_this,
|
||||
jobject jthis, const char *name_of_field, DB_LSN value)
|
||||
{
|
||||
set_object_field(jnienv, class_of_this, jthis, name_DB_LSN,
|
||||
name_of_field, get_DbLsn(jnienv, value));
|
||||
}
|
||||
|
||||
/*
|
||||
* Report an exception back to the java side.
|
||||
*/
|
||||
void report_exception(JNIEnv *jnienv, const char *text,
|
||||
int err, unsigned long expect_mask)
|
||||
{
|
||||
jstring textString;
|
||||
jclass dbexcept;
|
||||
jclass javaexcept;
|
||||
jthrowable obj;
|
||||
|
||||
textString = NULL;
|
||||
dbexcept = NULL;
|
||||
javaexcept = NULL;
|
||||
|
||||
switch (err) {
|
||||
/*
|
||||
* DB_JAVA_CALLBACK is returned by
|
||||
* dbji_call_append_recno() (the append_recno callback)
|
||||
* when the Java version of the callback has thrown
|
||||
* an exception, and we want to pass the exception on.
|
||||
* The exception has already been thrown, we
|
||||
* don't want to throw a new one.
|
||||
*/
|
||||
case DB_JAVA_CALLBACK:
|
||||
break;
|
||||
case ENOENT:
|
||||
/*
|
||||
* In this case there is a corresponding
|
||||
* standard java exception type that we'll use.
|
||||
* First we make sure that the calling function
|
||||
* expected this kind of error, if not we give
|
||||
* an 'internal error' DbException, since
|
||||
* we must not throw an exception type that isn't
|
||||
* declared in the signature.
|
||||
*
|
||||
* We'll make this a little more general if/when
|
||||
* we add more java standard exceptions.
|
||||
*/
|
||||
if ((expect_mask & EXCEPTION_FILE_NOT_FOUND) != 0) {
|
||||
javaexcept = (*jnienv)->FindClass(jnienv,
|
||||
"java/io/FileNotFoundException");
|
||||
}
|
||||
else {
|
||||
char errstr[1024];
|
||||
|
||||
snprintf(errstr, sizeof(errstr),
|
||||
"internal error: unexpected errno: %s",
|
||||
text);
|
||||
textString = get_java_string(jnienv,
|
||||
errstr);
|
||||
dbexcept = get_class(jnienv,
|
||||
name_DB_EXCEPTION);
|
||||
}
|
||||
break;
|
||||
case DB_RUNRECOVERY:
|
||||
dbexcept = get_class(jnienv,
|
||||
name_DB_RUNRECOVERY_EX);
|
||||
break;
|
||||
case DB_LOCK_DEADLOCK:
|
||||
dbexcept = get_class(jnienv, name_DB_DEADLOCK_EX);
|
||||
break;
|
||||
default:
|
||||
dbexcept = get_class(jnienv, name_DB_EXCEPTION);
|
||||
break;
|
||||
}
|
||||
if (dbexcept != NULL) {
|
||||
if (textString == NULL)
|
||||
textString = get_java_string(jnienv, text);
|
||||
if ((obj = create_exception(jnienv, textString, err, dbexcept))
|
||||
!= NULL)
|
||||
(*jnienv)->Throw(jnienv, obj);
|
||||
/* Otherwise, an exception has been posted. */
|
||||
}
|
||||
else if (javaexcept != NULL)
|
||||
(*jnienv)->ThrowNew(jnienv, javaexcept, text);
|
||||
else
|
||||
fprintf(stderr,
|
||||
"report_exception: failed to create an exception\n");
|
||||
}
|
||||
|
||||
/*
|
||||
* Report an exception back to the java side, for the specific
|
||||
* case of DB_LOCK_NOTGRANTED, as more things are added to the
|
||||
* constructor of this type of exception.
|
||||
*/
|
||||
void report_notgranted_exception(JNIEnv *jnienv, const char *text,
|
||||
db_lockop_t op, db_lockmode_t mode,
|
||||
jobject jdbt, jobject jlock, int index)
|
||||
{
|
||||
jstring textString;
|
||||
jclass dbexcept;
|
||||
jthrowable obj;
|
||||
jmethodID mid;
|
||||
|
||||
if ((dbexcept = get_class(jnienv, name_DB_LOCKNOTGRANTED_EX)) == NULL)
|
||||
return; /* An exception has been posted. */
|
||||
textString = get_java_string(jnienv, text);
|
||||
|
||||
mid = (*jnienv)->GetMethodID(jnienv, dbexcept, "<init>",
|
||||
"(Ljava/lang/String;II"
|
||||
"Lcom/sleepycat/db/Dbt;"
|
||||
"Lcom/sleepycat/db/DbLock;I)V");
|
||||
if ((obj = (jthrowable)(*jnienv)->NewObject(jnienv, dbexcept,
|
||||
mid, textString, op, mode, jdbt, jlock, index)) != NULL)
|
||||
(*jnienv)->Throw(jnienv, obj);
|
||||
else
|
||||
fprintf(stderr,
|
||||
"report_notgranted_exception: failed to create an exception\n");
|
||||
}
|
||||
|
||||
/*
|
||||
* Create an exception object and return it.
|
||||
* The given class must have a constructor that has a
|
||||
* constructor with args (java.lang.String text, int errno);
|
||||
* DbException and its subclasses fit this bill.
|
||||
*/
|
||||
jobject create_exception(JNIEnv *jnienv, jstring text,
|
||||
int err, jclass dbexcept)
|
||||
{
|
||||
jthrowable obj;
|
||||
jmethodID mid;
|
||||
|
||||
mid = (*jnienv)->GetMethodID(jnienv, dbexcept, "<init>",
|
||||
"(Ljava/lang/String;I)V");
|
||||
if (mid != NULL)
|
||||
obj = (jthrowable)(*jnienv)->NewObject(jnienv, dbexcept, mid,
|
||||
text, err);
|
||||
else {
|
||||
fprintf(stderr, "Cannot get exception init method ID!\n");
|
||||
obj = NULL;
|
||||
}
|
||||
|
||||
return (obj);
|
||||
}
|
||||
|
||||
/*
|
||||
* Report an error via the errcall mechanism.
|
||||
*/
|
||||
void report_errcall(JNIEnv *jnienv, jobject errcall,
|
||||
jstring prefix, const char *message)
|
||||
{
|
||||
jmethodID id;
|
||||
jclass errcall_class;
|
||||
jstring msg;
|
||||
|
||||
if ((errcall_class = get_class(jnienv, name_DbErrcall)) == NULL)
|
||||
return; /* An exception has been posted. */
|
||||
msg = get_java_string(jnienv, message);
|
||||
|
||||
id = (*jnienv)->GetMethodID(jnienv, errcall_class,
|
||||
"errcall",
|
||||
"(Ljava/lang/String;Ljava/lang/String;)V");
|
||||
if (id == NULL) {
|
||||
fprintf(stderr, "Cannot get errcall methodID!\n");
|
||||
fprintf(stderr, "error: %s\n", message);
|
||||
return;
|
||||
}
|
||||
|
||||
(*jnienv)->CallVoidMethod(jnienv, errcall, id, prefix, msg);
|
||||
}
|
||||
|
||||
/*
|
||||
* If the object is null, report an exception and return false (0),
|
||||
* otherwise return true (1).
|
||||
*/
|
||||
int verify_non_null(JNIEnv *jnienv, void *obj)
|
||||
{
|
||||
if (obj == NULL) {
|
||||
report_exception(jnienv, "null object", EINVAL, 0);
|
||||
return (0);
|
||||
}
|
||||
return (1);
|
||||
}
|
||||
|
||||
/*
|
||||
* If the error code is non-zero, report an exception and return false (0),
|
||||
* otherwise return true (1).
|
||||
*/
|
||||
int verify_return(JNIEnv *jnienv, int err, unsigned long expect_mask)
|
||||
{
|
||||
if (err == 0)
|
||||
return (1);
|
||||
|
||||
report_exception(jnienv, db_strerror(err), err, expect_mask);
|
||||
return (0);
|
||||
}
|
||||
|
||||
/*
|
||||
* Verify that there was no memory error due to undersized Dbt.
|
||||
* If there is report a DbMemoryException, with the Dbt attached
|
||||
* and return false (0), otherwise return true (1).
|
||||
*/
|
||||
int verify_dbt(JNIEnv *jnienv, int err, LOCKED_DBT *ldbt)
|
||||
{
|
||||
DBT *dbt;
|
||||
jobject exception;
|
||||
jstring text;
|
||||
jclass dbexcept;
|
||||
jmethodID mid;
|
||||
|
||||
if (err != ENOMEM)
|
||||
return (1);
|
||||
|
||||
dbt = &ldbt->javainfo->dbt;
|
||||
if (!F_ISSET(dbt, DB_DBT_USERMEM) || dbt->size <= dbt->ulen)
|
||||
return (1);
|
||||
|
||||
/* Create/throw an exception of type DbMemoryException */
|
||||
if ((dbexcept = get_class(jnienv, name_DB_MEMORY_EX)) == NULL)
|
||||
return (1); /* An exception has been posted. */
|
||||
text = get_java_string(jnienv,
|
||||
"Dbt not large enough for available data");
|
||||
exception = create_exception(jnienv, text, ENOMEM, dbexcept);
|
||||
|
||||
/* Attach the dbt to the exception */
|
||||
mid = (*jnienv)->GetMethodID(jnienv, dbexcept, "set_dbt",
|
||||
"(L" DB_PACKAGE_NAME "Dbt;)V");
|
||||
(*jnienv)->CallVoidMethod(jnienv, exception, mid, ldbt->jdbt);
|
||||
(*jnienv)->Throw(jnienv, exception);
|
||||
return (0);
|
||||
}
|
||||
|
||||
/*
|
||||
* Create an object of the given class, calling its default constructor.
|
||||
*/
|
||||
jobject create_default_object(JNIEnv *jnienv, const char *class_name)
|
||||
{
|
||||
jmethodID id;
|
||||
jclass dbclass;
|
||||
|
||||
if ((dbclass = get_class(jnienv, class_name)) == NULL)
|
||||
return (NULL); /* An exception has been posted. */
|
||||
id = (*jnienv)->GetMethodID(jnienv, dbclass, "<init>", "()V");
|
||||
return ((*jnienv)->NewObject(jnienv, dbclass, id));
|
||||
}
|
||||
|
||||
/*
|
||||
* Convert an DB object to a Java encapsulation of that object.
|
||||
* Note: This implementation creates a new Java object on each call,
|
||||
* so it is generally useful when a new DB object has just been created.
|
||||
*/
|
||||
jobject convert_object(JNIEnv *jnienv, const char *class_name, void *dbobj)
|
||||
{
|
||||
jobject jo;
|
||||
|
||||
if (!dbobj)
|
||||
return (0);
|
||||
|
||||
jo = create_default_object(jnienv, class_name);
|
||||
set_private_dbobj(jnienv, class_name, jo, dbobj);
|
||||
return (jo);
|
||||
}
|
||||
|
||||
/*
|
||||
* Create a copy of the string
|
||||
*/
|
||||
char *dup_string(const char *str)
|
||||
{
|
||||
int len;
|
||||
char *retval;
|
||||
int err;
|
||||
|
||||
len = strlen(str) + 1;
|
||||
if ((err = __os_malloc(NULL, sizeof(char)*len, &retval)) != 0)
|
||||
return (NULL);
|
||||
strncpy(retval, str, len);
|
||||
return (retval);
|
||||
}
|
||||
|
||||
/*
|
||||
* Create a java string from the given string
|
||||
*/
|
||||
jstring get_java_string(JNIEnv *jnienv, const char* string)
|
||||
{
|
||||
if (string == 0)
|
||||
return (0);
|
||||
return ((*jnienv)->NewStringUTF(jnienv, string));
|
||||
}
|
||||
|
||||
/*
|
||||
* Create a copy of the java string using __os_malloc.
|
||||
* Caller must free it.
|
||||
*/
|
||||
char *get_c_string(JNIEnv *jnienv, jstring jstr)
|
||||
{
|
||||
const char *utf;
|
||||
char *retval;
|
||||
|
||||
utf = (*jnienv)->GetStringUTFChars(jnienv, jstr, NULL);
|
||||
retval = dup_string(utf);
|
||||
(*jnienv)->ReleaseStringUTFChars(jnienv, jstr, utf);
|
||||
return (retval);
|
||||
}
|
||||
|
||||
/*
|
||||
* Convert a java object to the various C pointers they represent.
|
||||
*/
|
||||
DB *get_DB(JNIEnv *jnienv, jobject obj)
|
||||
{
|
||||
return ((DB *)get_private_dbobj(jnienv, name_DB, obj));
|
||||
}
|
||||
|
||||
DB_BTREE_STAT *get_DB_BTREE_STAT(JNIEnv *jnienv, jobject obj)
|
||||
{
|
||||
return ((DB_BTREE_STAT *)
|
||||
get_private_dbobj(jnienv, name_DB_BTREE_STAT, obj));
|
||||
}
|
||||
|
||||
DBC *get_DBC(JNIEnv *jnienv, jobject obj)
|
||||
{
|
||||
return ((DBC *)get_private_dbobj(jnienv, name_DBC, obj));
|
||||
}
|
||||
|
||||
DB_ENV *get_DB_ENV(JNIEnv *jnienv, jobject obj)
|
||||
{
|
||||
return ((DB_ENV *)get_private_dbobj(jnienv, name_DB_ENV, obj));
|
||||
}
|
||||
|
||||
DB_ENV_JAVAINFO *get_DB_ENV_JAVAINFO(JNIEnv *jnienv, jobject obj)
|
||||
{
|
||||
return ((DB_ENV_JAVAINFO *)get_private_info(jnienv, name_DB_ENV, obj));
|
||||
}
|
||||
|
||||
DB_HASH_STAT *get_DB_HASH_STAT(JNIEnv *jnienv, jobject obj)
|
||||
{
|
||||
return ((DB_HASH_STAT *)
|
||||
get_private_dbobj(jnienv, name_DB_HASH_STAT, obj));
|
||||
}
|
||||
|
||||
DB_JAVAINFO *get_DB_JAVAINFO(JNIEnv *jnienv, jobject obj)
|
||||
{
|
||||
return ((DB_JAVAINFO *)get_private_info(jnienv, name_DB, obj));
|
||||
}
|
||||
|
||||
DB_LOCK *get_DB_LOCK(JNIEnv *jnienv, jobject obj)
|
||||
{
|
||||
return ((DB_LOCK *)get_private_dbobj(jnienv, name_DB_LOCK, obj));
|
||||
}
|
||||
|
||||
DB_LOGC *get_DB_LOGC(JNIEnv *jnienv, jobject obj)
|
||||
{
|
||||
return ((DB_LOGC *)get_private_dbobj(jnienv, name_DB_LOGC, obj));
|
||||
}
|
||||
|
||||
DB_LOG_STAT *get_DB_LOG_STAT(JNIEnv *jnienv, jobject obj)
|
||||
{
|
||||
return ((DB_LOG_STAT *)
|
||||
get_private_dbobj(jnienv, name_DB_LOG_STAT, obj));
|
||||
}
|
||||
|
||||
DB_LSN *get_DB_LSN(JNIEnv *jnienv, /* DbLsn */ jobject obj) {
|
||||
/*
|
||||
* DbLsns that are created from within java (new DbLsn()) rather
|
||||
* than from within C (get_DbLsn()) may not have a "private" DB_LSN
|
||||
* structure allocated for them yet. We can't do this in the
|
||||
* actual constructor (init_lsn()), because there's no way to pass
|
||||
* in an initializing value in, and because the get_DbLsn()/
|
||||
* convert_object() code path needs a copy of the pointer before
|
||||
* the constructor gets called. Thus, get_DbLsn() allocates and
|
||||
* fills a DB_LSN for the object it's about to create.
|
||||
*
|
||||
* Since "new DbLsn()" may reasonably be passed as an argument to
|
||||
* functions such as DbEnv.log_put(), though, we need to make sure
|
||||
* that DB_LSN's get allocated when the object was created from
|
||||
* Java, too. Here, we lazily allocate a new private DB_LSN if
|
||||
* and only if it turns out that we don't already have one.
|
||||
*
|
||||
* The only exception is if the DbLsn object is a Java null
|
||||
* (in which case the jobject will also be NULL). Then a NULL
|
||||
* DB_LSN is legitimate.
|
||||
*/
|
||||
DB_LSN *lsnp;
|
||||
int err;
|
||||
|
||||
if (obj == NULL)
|
||||
return (NULL);
|
||||
|
||||
lsnp = (DB_LSN *)get_private_dbobj(jnienv, name_DB_LSN, obj);
|
||||
if (lsnp == NULL) {
|
||||
if ((err = __os_malloc(NULL, sizeof(DB_LSN), &lsnp)) != 0)
|
||||
return (NULL);
|
||||
memset(lsnp, 0, sizeof(DB_LSN));
|
||||
set_private_dbobj(jnienv, name_DB_LSN, obj, lsnp);
|
||||
}
|
||||
|
||||
return (lsnp);
|
||||
}
|
||||
|
||||
DB_MPOOL_FSTAT *get_DB_MPOOL_FSTAT(JNIEnv *jnienv, jobject obj)
|
||||
{
|
||||
return ((DB_MPOOL_FSTAT *)
|
||||
get_private_dbobj(jnienv, name_DB_MPOOL_FSTAT, obj));
|
||||
}
|
||||
|
||||
DB_MPOOL_STAT *get_DB_MPOOL_STAT(JNIEnv *jnienv, jobject obj)
|
||||
{
|
||||
return ((DB_MPOOL_STAT *)
|
||||
get_private_dbobj(jnienv, name_DB_MPOOL_STAT, obj));
|
||||
}
|
||||
|
||||
DB_QUEUE_STAT *get_DB_QUEUE_STAT(JNIEnv *jnienv, jobject obj)
|
||||
{
|
||||
return ((DB_QUEUE_STAT *)
|
||||
get_private_dbobj(jnienv, name_DB_QUEUE_STAT, obj));
|
||||
}
|
||||
|
||||
DB_TXN *get_DB_TXN(JNIEnv *jnienv, jobject obj)
|
||||
{
|
||||
return ((DB_TXN *)get_private_dbobj(jnienv, name_DB_TXN, obj));
|
||||
}
|
||||
|
||||
DB_TXN_STAT *get_DB_TXN_STAT(JNIEnv *jnienv, jobject obj)
|
||||
{
|
||||
return ((DB_TXN_STAT *)
|
||||
get_private_dbobj(jnienv, name_DB_TXN_STAT, obj));
|
||||
}
|
||||
|
||||
DBT *get_DBT(JNIEnv *jnienv, jobject obj)
|
||||
{
|
||||
DBT_JAVAINFO *ji;
|
||||
|
||||
ji = (DBT_JAVAINFO *)get_private_dbobj(jnienv, name_DBT, obj);
|
||||
if (ji == NULL)
|
||||
return (NULL);
|
||||
else
|
||||
return (&ji->dbt);
|
||||
}
|
||||
|
||||
DBT_JAVAINFO *get_DBT_JAVAINFO(JNIEnv *jnienv, jobject obj)
|
||||
{
|
||||
return ((DBT_JAVAINFO *)get_private_dbobj(jnienv, name_DBT, obj));
|
||||
}
|
||||
|
||||
/*
|
||||
* Convert a C pointer to the various Java objects they represent.
|
||||
*/
|
||||
jobject get_DbBtreeStat(JNIEnv *jnienv, DB_BTREE_STAT *dbobj)
|
||||
{
|
||||
return (convert_object(jnienv, name_DB_BTREE_STAT, dbobj));
|
||||
}
|
||||
|
||||
jobject get_Dbc(JNIEnv *jnienv, DBC *dbobj)
|
||||
{
|
||||
return (convert_object(jnienv, name_DBC, dbobj));
|
||||
}
|
||||
|
||||
jobject get_DbHashStat(JNIEnv *jnienv, DB_HASH_STAT *dbobj)
|
||||
{
|
||||
return (convert_object(jnienv, name_DB_HASH_STAT, dbobj));
|
||||
}
|
||||
|
||||
jobject get_DbLogc(JNIEnv *jnienv, DB_LOGC *dbobj)
|
||||
{
|
||||
return (convert_object(jnienv, name_DB_LOGC, dbobj));
|
||||
}
|
||||
|
||||
jobject get_DbLogStat(JNIEnv *jnienv, DB_LOG_STAT *dbobj)
|
||||
{
|
||||
return (convert_object(jnienv, name_DB_LOG_STAT, dbobj));
|
||||
}
|
||||
|
||||
/*
|
||||
* LSNs are different since they are really normally
|
||||
* treated as by-value objects. We actually create
|
||||
* a pointer to the LSN and store that, deleting it
|
||||
* when the LSN is GC'd.
|
||||
*/
|
||||
jobject get_DbLsn(JNIEnv *jnienv, DB_LSN dbobj)
|
||||
{
|
||||
DB_LSN *lsnp;
|
||||
int err;
|
||||
|
||||
if ((err = __os_malloc(NULL, sizeof(DB_LSN), &lsnp)) != 0)
|
||||
return (NULL);
|
||||
|
||||
memset(lsnp, 0, sizeof(DB_LSN));
|
||||
*lsnp = dbobj;
|
||||
return (convert_object(jnienv, name_DB_LSN, lsnp));
|
||||
}
|
||||
|
||||
/*
|
||||
* Shared code for get_Dbt and get_const_Dbt.
|
||||
*
|
||||
* XXX
|
||||
* Currently we make no distinction in implementation of these
|
||||
* two kinds of Dbts, although in the future we may want to.
|
||||
* (It's probably easier to make the optimizations listed below
|
||||
* with readonly Dbts).
|
||||
*
|
||||
* Dbt's created via this function are only used for a short lifetime,
|
||||
* during callback functions. In the future, we should consider taking
|
||||
* advantage of this by having a pool of Dbt objects instead of creating
|
||||
* new ones each time. Because of multithreading, we may need an
|
||||
* arbitrary number. We might also have sharing of the byte arrays
|
||||
* used by the Dbts.
|
||||
*/
|
||||
static jobject get_Dbt_shared(JNIEnv *jnienv, const DBT *dbt, int readonly,
|
||||
DBT_JAVAINFO **ret_info)
|
||||
{
|
||||
jobject jdbt;
|
||||
DBT_JAVAINFO *dbtji;
|
||||
|
||||
COMPQUIET(readonly, 0);
|
||||
|
||||
/* A NULL DBT should become a null Dbt. */
|
||||
if (dbt == NULL)
|
||||
return (NULL);
|
||||
|
||||
/*
|
||||
* Note that a side effect of creating a Dbt object
|
||||
* is the creation of the attached DBT_JAVAINFO object
|
||||
* (see the native implementation of Dbt.init())
|
||||
* A DBT_JAVAINFO object contains its own DBT.
|
||||
*/
|
||||
jdbt = create_default_object(jnienv, name_DBT);
|
||||
dbtji = get_DBT_JAVAINFO(jnienv, jdbt);
|
||||
memcpy(&dbtji->dbt, dbt, sizeof(DBT));
|
||||
|
||||
/*
|
||||
* Set the boolean indicator so that the Java side knows to
|
||||
* call back when it wants to look at the array. This avoids
|
||||
* needlessly creating/copying arrays that may never be looked at.
|
||||
*/
|
||||
(*jnienv)->SetBooleanField(jnienv, jdbt, fid_Dbt_must_create_data, 1);
|
||||
(*jnienv)->SetIntField(jnienv, jdbt, fid_Dbt_size, dbt->size);
|
||||
|
||||
if (ret_info != NULL)
|
||||
*ret_info = dbtji;
|
||||
return (jdbt);
|
||||
}
|
||||
|
||||
/*
|
||||
* Get a writeable Dbt.
|
||||
*
|
||||
* Currently we're sharing code with get_const_Dbt.
|
||||
* It really shouldn't be this way, we have a DBT that we can
|
||||
* change, and have some mechanism for copying back
|
||||
* any changes to the original DBT.
|
||||
*/
|
||||
jobject get_Dbt(JNIEnv *jnienv, DBT *dbt,
|
||||
DBT_JAVAINFO **ret_info)
|
||||
{
|
||||
return (get_Dbt_shared(jnienv, dbt, 0, ret_info));
|
||||
}
|
||||
|
||||
/*
|
||||
* Get a Dbt that we promise not to change, or at least
|
||||
* if there are changes, they don't matter and won't get
|
||||
* seen by anyone.
|
||||
*/
|
||||
jobject get_const_Dbt(JNIEnv *jnienv, const DBT *dbt,
|
||||
DBT_JAVAINFO **ret_info)
|
||||
{
|
||||
return (get_Dbt_shared(jnienv, dbt, 1, ret_info));
|
||||
}
|
||||
|
||||
jobject get_DbMpoolFStat(JNIEnv *jnienv, DB_MPOOL_FSTAT *dbobj)
|
||||
{
|
||||
return (convert_object(jnienv, name_DB_MPOOL_FSTAT, dbobj));
|
||||
}
|
||||
|
||||
jobject get_DbMpoolStat(JNIEnv *jnienv, DB_MPOOL_STAT *dbobj)
|
||||
{
|
||||
return (convert_object(jnienv, name_DB_MPOOL_STAT, dbobj));
|
||||
}
|
||||
|
||||
jobject get_DbQueueStat(JNIEnv *jnienv, DB_QUEUE_STAT *dbobj)
|
||||
{
|
||||
return (convert_object(jnienv, name_DB_QUEUE_STAT, dbobj));
|
||||
}
|
||||
|
||||
jobject get_DbTxn(JNIEnv *jnienv, DB_TXN *dbobj)
|
||||
{
|
||||
return (convert_object(jnienv, name_DB_TXN, dbobj));
|
||||
}
|
||||
|
||||
jobject get_DbTxnStat(JNIEnv *jnienv, DB_TXN_STAT *dbobj)
|
||||
{
|
||||
return (convert_object(jnienv, name_DB_TXN_STAT, dbobj));
|
||||
}
|
||||
Reference in New Issue
Block a user