[RocksJava] enable/disable File deletions
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@ -1588,6 +1588,53 @@ public class RocksDB extends RocksObject {
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columnFamilyHandle.nativeHandle_);
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}
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/**
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* <p>The sequence number of the most recent transaction.</p>
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*
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* @return sequence number of the most
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* recent transaction.
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*/
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public long getLatestSequenceNumber() {
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return getLatestSequenceNumber(nativeHandle_);
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}
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/**
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* <p>Prevent file deletions. Compactions will continue to occur,
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* but no obsolete files will be deleted. Calling this multiple
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* times have the same effect as calling it once.</p>
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*
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* @throws RocksDBException thrown if operation was not performed
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* successfully.
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*/
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public void disableFileDeletions() throws RocksDBException {
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disableFileDeletions(nativeHandle_);
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}
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/**
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* <p>Allow compactions to delete obsolete files.
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* If force == true, the call to EnableFileDeletions()
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* will guarantee that file deletions are enabled after
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* the call, even if DisableFileDeletions() was called
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* multiple times before.</p>
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*
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* <p>If force == false, EnableFileDeletions will only
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* enable file deletion after it's been called at least
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* as many times as DisableFileDeletions(), enabling
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* the two methods to be called by two threads
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* concurrently without synchronization
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* -- i.e., file deletions will be enabled only after both
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* threads call EnableFileDeletions()</p>
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*
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* @param force boolean value described above.
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*
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* @throws RocksDBException thrown if operation was not performed
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* successfully.
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*/
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public void enableFileDeletions(boolean force)
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throws RocksDBException {
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enableFileDeletions(nativeHandle_, force);
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}
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/**
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* <p>Returns an iterator that is positioned at a write-batch containing
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* seq_number. If the sequence number is non existent, it returns an iterator
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@ -1753,6 +1800,11 @@ public class RocksDB extends RocksObject {
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private native void compactRange(long handle, byte[] begin, int beginLen, byte[] end,
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int endLen, boolean reduce_level, int target_level, int target_path_id,
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long cfHandle) throws RocksDBException;
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private native long getLatestSequenceNumber(long handle);
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private native void disableFileDeletions(long handle)
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throws RocksDBException;
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private native void enableFileDeletions(long handle,
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boolean force) throws RocksDBException;
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private native long getUpdatesSince(long handle, long sequenceNumber)
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throws RocksDBException;
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@ -738,4 +738,25 @@ public class RocksDBTest {
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}
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}
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}
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@Test
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public void enableDisableFileDeletions() throws RocksDBException {
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RocksDB db = null;
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Options options = null;
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try {
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options = new Options().setCreateIfMissing(true);
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db = RocksDB.open(options, dbFolder.getRoot().getAbsolutePath());
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db.disableFileDeletions();
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db.enableFileDeletions(false);
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db.disableFileDeletions();
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db.enableFileDeletions(true);
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} finally {
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if (db != null) {
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db.close();
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}
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if (options != null) {
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options.dispose();
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}
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}
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}
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}
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@ -57,6 +57,9 @@ public class TransactionLogIteratorTest {
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String.valueOf(i).getBytes());
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}
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db.flush(new FlushOptions().setWaitForFlush(true));
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assertThat(db.getLatestSequenceNumber()).isEqualTo(250);
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transactionLogIterator = db.getUpdatesSince(0);
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assertThat(transactionLogIterator.isValid()).isTrue();
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transactionLogIterator.status();
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@ -1601,6 +1601,51 @@ void Java_org_rocksdb_RocksDB_compactRange__J_3BI_3BIZIIJ(
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jend, jend_len, jreduce_level, jtarget_level, jtarget_path_id);
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}
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//////////////////////////////////////////////////////////////////////////////
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// rocksdb::DB::GetLatestSequenceNumber
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/*
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* Class: org_rocksdb_RocksDB
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* Method: getLatestSequenceNumber
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* Signature: (J)V
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*/
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jlong Java_org_rocksdb_RocksDB_getLatestSequenceNumber(JNIEnv* env,
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jobject jdb, jlong jdb_handle) {
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auto db = reinterpret_cast<rocksdb::DB*>(jdb_handle);
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return db->GetLatestSequenceNumber();
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}
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//////////////////////////////////////////////////////////////////////////////
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// rocksdb::DB enable/disable file deletions
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/*
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* Class: org_rocksdb_RocksDB
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* Method: enableFileDeletions
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* Signature: (J)V
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*/
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void Java_org_rocksdb_RocksDB_disableFileDeletions(JNIEnv* env,
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jobject jdb, jlong jdb_handle) {
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auto db = reinterpret_cast<rocksdb::DB*>(jdb_handle);
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rocksdb::Status s = db->DisableFileDeletions();
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if (!s.ok()) {
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rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
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}
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}
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/*
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* Class: org_rocksdb_RocksDB
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* Method: enableFileDeletions
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* Signature: (JZ)V
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*/
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void Java_org_rocksdb_RocksDB_enableFileDeletions(JNIEnv* env,
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jobject jdb, jlong jdb_handle, jboolean jforce) {
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auto db = reinterpret_cast<rocksdb::DB*>(jdb_handle);
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rocksdb::Status s = db->EnableFileDeletions(jforce);
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if (!s.ok()) {
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rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
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}
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}
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//////////////////////////////////////////////////////////////////////////////
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// rocksdb::DB::GetUpdatesSince
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