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[Java] Add purgeOldBackups API

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Summary:
1. Check status of CreateNewBackup. If status is not OK, then throw.
2. Add purgeOldBackups API

Test Plan:
make test
make sample

Reviewers: haobo, sdong, zzbennett, swapnilghike, yhchiang

Reviewed By: yhchiang

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D21753
This commit is contained in:
Yueh-Hsuan Chiang 2014-08-14 10:58:09 -07:00
parent 6c4c159b2c
commit 2da53b1e06
2 changed files with 30 additions and 1 deletions
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10
java/org/rocksdb/BackupableDB.java
View File

@ -47,6 +47,15 @@ public class BackupableDB extends RocksDB {
public void createNewBackup(boolean flushBeforeBackup) { public void createNewBackup(boolean flushBeforeBackup) {
createNewBackup(nativeHandle_, flushBeforeBackup); createNewBackup(nativeHandle_, flushBeforeBackup);
} }
/**
* Deletes old backups, keeping latest numBackupsToKeep alive.
*
* @param numBackupsToKeep Number of latest backups to keep.
*/
public void purgeOldBackups(int numBackupsToKeep) {
purgeOldBackups(nativeHandle_, numBackupsToKeep);
}
/** /**
@ -77,4 +86,5 @@ public class BackupableDB extends RocksDB {
protected native void open(long rocksDBHandle, long backupDBOptionsHandle); protected native void open(long rocksDBHandle, long backupDBOptionsHandle);
protected native void createNewBackup(long handle, boolean flag); protected native void createNewBackup(long handle, boolean flag);
protected native void purgeOldBackups(long handle, int numBackupsToKeep);
} }

21
java/rocksjni/backupablejni.cc
View File

@ -40,7 +40,26 @@ void Java_org_rocksdb_BackupableDB_open(
*/ */
void Java_org_rocksdb_BackupableDB_createNewBackup( void Java_org_rocksdb_BackupableDB_createNewBackup(
JNIEnv* env, jobject jbdb, jlong jhandle, jboolean jflag) { JNIEnv* env, jobject jbdb, jlong jhandle, jboolean jflag) {
reinterpret_cast<rocksdb::BackupableDB*>(jhandle)->CreateNewBackup(jflag); rocksdb::Status s =
reinterpret_cast<rocksdb::BackupableDB*>(jhandle)->CreateNewBackup(jflag);
if (!s.ok()) {
rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
}
}
/*
* Class: org_rocksdb_BackupableDB
* Method: purgeOldBackups
* Signature: (JI)V
*/
void Java_org_rocksdb_BackupableDB_purgeOldBackups(
JNIEnv* env, jobject jbdb, jlong jhandle, jboolean jnumBackupsToKeep) {
rocksdb::Status s =
reinterpret_cast<rocksdb::BackupableDB*>(jhandle)->
PurgeOldBackups(jnumBackupsToKeep);
if (!s.ok()) {
rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
}
} }
/////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////