lmdbjava/src/test/java/org/lmdbjava/TxnTest.java at more-cursor-tests · lmdbjava/lmdbjava · GitHub

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* Licensed 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.lmdbjava;

import static com.jakewharton.byteunits.BinaryByteUnit.KIBIBYTES;

import static java.nio.ByteBuffer.allocateDirect;

import static java.nio.charset.StandardCharsets.UTF_8;

import static org.assertj.core.api.Assertions.assertThat;

import static org.assertj.core.api.Assertions.assertThatThrownBy;

import static org.lmdbjava.DbiFlags.MDB_CREATE;

import static org.lmdbjava.Env.create;

import static org.lmdbjava.EnvFlags.MDB_NOSUBDIR;

import static org.lmdbjava.EnvFlags.MDB_RDONLY_ENV;

import static org.lmdbjava.KeyRange.closed;

import static org.lmdbjava.TestUtils.DB_1;

import static org.lmdbjava.TestUtils.POSIX_MODE;

import static org.lmdbjava.TestUtils.bb;

import static org.lmdbjava.Txn.State.DONE;

import static org.lmdbjava.Txn.State.READY;

import static org.lmdbjava.Txn.State.RELEASED;

import static org.lmdbjava.Txn.State.RESET;

import static org.lmdbjava.TxnFlags.MDB_RDONLY_TXN;

import java.io.IOException;

import java.nio.ByteBuffer;

import java.nio.file.Path;

import java.util.ArrayList;

import java.util.List;

import java.util.concurrent.atomic.AtomicLong;

import org.junit.jupiter.api.AfterEach;

import org.junit.jupiter.api.BeforeEach;

import org.junit.jupiter.api.Test;

import org.lmdbjava.Dbi.BadValueSizeException;

import org.lmdbjava.Env.AlreadyClosedException;

import org.lmdbjava.Txn.EnvIsReadOnly;

import org.lmdbjava.Txn.IncompatibleParent;

import org.lmdbjava.Txn.NotReadyException;

import org.lmdbjava.Txn.NotResetException;

import org.lmdbjava.Txn.ReadOnlyRequiredException;

import org.lmdbjava.Txn.ReadWriteRequiredException;

import org.lmdbjava.Txn.ResetException;

/** Test {@link Txn}. */

public final class TxnTest {

private Path file;

private Env<ByteBuffer> env;

@BeforeEach

void beforeEach() {

file = FileUtil.createTempFile();

env =

create()

.setMapSize(KIBIBYTES.toBytes(256))

.setMaxReaders(1)

.setMaxDbs(2)

.open(file.toFile(), POSIX_MODE, MDB_NOSUBDIR);

}

@AfterEach

void afterEach() {

env.close();

FileUtil.deleteFile(file);

}

@Test

void largeKeysRejected() throws IOException {

assertThatThrownBy(

() -> {

final Dbi<ByteBuffer> dbi = env.openDbi(DB_1, MDB_CREATE);

final ByteBuffer key = allocateDirect(env.getMaxKeySize() + 1);

key.limit(key.capacity());

dbi.put(key, bb(2));

})

.isInstanceOf(BadValueSizeException.class);

}

@Test

void rangeSearch() {

final Dbi<ByteBuffer> db = env.openDbi(DB_1, MDB_CREATE);

final ByteBuffer key = allocateDirect(env.getMaxKeySize());

key.put("cherry".getBytes(UTF_8)).flip();

db.put(key, bb(1));

key.clear();

key.put("strawberry".getBytes(UTF_8)).flip();

db.put(key, bb(3));

key.clear();

key.put("pineapple".getBytes(UTF_8)).flip();

db.put(key, bb(2));

try (Txn<ByteBuffer> txn = env.txnRead()) {

final ByteBuffer start = allocateDirect(env.getMaxKeySize());

start.put("a".getBytes(UTF_8)).flip();

final ByteBuffer end = allocateDirect(env.getMaxKeySize());

end.put("z".getBytes(UTF_8)).flip();

final List<String> keysFound = new ArrayList<>();

try (CursorIterable<ByteBuffer> ckr = db.iterate(txn, closed(start, end))) {

for (final CursorIterable.KeyVal<ByteBuffer> kv : ckr) {

keysFound.add(UTF_8.decode(kv.key()).toString());

}

assertThat(keysFound.size()).isEqualTo(3);

}

@Test

void readOnlyTxnAllowedInReadOnlyEnv() {

env.openDbi(DB_1, MDB_CREATE);

try (Env<ByteBuffer> roEnv =

create().setMaxReaders(1).open(file.toFile(), MDB_NOSUBDIR, MDB_RDONLY_ENV)) {

assertThat(roEnv.txnRead()).isNotNull();

}

@Test

void readWriteTxnDeniedInReadOnlyEnv() {

assertThatThrownBy(

() -> {

env.openDbi(DB_1, MDB_CREATE);

env.close();

try (Env<ByteBuffer> roEnv =

create().setMaxReaders(1).open(file.toFile(), MDB_NOSUBDIR, MDB_RDONLY_ENV)) {

roEnv.txnWrite(); // error

}

})

.isInstanceOf(EnvIsReadOnly.class);

}

@Test

void testCheckNotCommitted() {

assertThatThrownBy(

() -> {

try (Txn<ByteBuffer> txn = env.txnRead()) {

txn.commit();

txn.checkReady();

}

})

.isInstanceOf(NotReadyException.class);

}

@Test

void testCheckReadOnly() {

assertThatThrownBy(

() -> {

try (Txn<ByteBuffer> txn = env.txnWrite()) {

txn.checkReadOnly();

}

})

.isInstanceOf(ReadOnlyRequiredException.class);

}

@Test

void testCheckWritesAllowed() {

assertThatThrownBy(

() -> {

try (Txn<ByteBuffer> txn = env.txnRead()) {

txn.checkWritesAllowed();

}

})

.isInstanceOf(ReadWriteRequiredException.class);

}

@Test

void testGetId() {

final Dbi<ByteBuffer> db = env.openDbi(DB_1, MDB_CREATE);

final AtomicLong txId1 = new AtomicLong();

final AtomicLong txId2 = new AtomicLong();

try (Txn<ByteBuffer> tx1 = env.txnRead()) {

txId1.set(tx1.getId());

}

db.put(bb(1), bb(2));

try (Txn<ByteBuffer> tx2 = env.txnRead()) {

txId2.set(tx2.getId());

}

// should not see the same snapshot

assertThat(txId1.get()).isNotEqualTo(txId2.get());

}

@Test

void txCanCommitThenCloseWithoutError() {

try (Txn<ByteBuffer> txn = env.txnRead()) {

assertThat(txn.getState()).isEqualTo(READY);

txn.commit();

assertThat(txn.getState()).isEqualTo(DONE);

}

@Test

void txCannotAbortIfAlreadyCommitted() {

assertThatThrownBy(

() -> {

try (Txn<ByteBuffer> txn = env.txnRead()) {

assertThat(txn.getState()).isEqualTo(READY);

txn.commit();

assertThat(txn.getState()).isEqualTo(DONE);

txn.abort();

}

})

.isInstanceOf(NotReadyException.class);

}

@Test

void txCannotCommitTwice() {

assertThatThrownBy(

() -> {

try (Txn<ByteBuffer> txn = env.txnRead()) {

txn.commit();

txn.commit(); // error

}

})

.isInstanceOf(NotReadyException.class);

}

@Test

void txConstructionDeniedIfEnvClosed() {

assertThatThrownBy(

() -> {

env.close();

env.txnRead();

})

.isInstanceOf(AlreadyClosedException.class);

}

@Test

void txRenewDeniedIfEnvClosed() {

assertThatThrownBy(

() -> {

final Txn<ByteBuffer> txnRead = env.txnRead();

txnRead.close();

env.close();

txnRead.renew();

})

.isInstanceOf(AlreadyClosedException.class);

}

@Test

void txCloseDeniedIfEnvClosed() {

assertThatThrownBy(

() -> {

final Txn<ByteBuffer> txnRead = env.txnRead();

env.close();

txnRead.close();

})

.isInstanceOf(AlreadyClosedException.class);

}

@Test

void txCommitDeniedIfEnvClosed() {

assertThatThrownBy(

() -> {

final Txn<ByteBuffer> txnRead = env.txnRead();

env.close();

txnRead.commit();

})

.isInstanceOf(AlreadyClosedException.class);

}

@Test

void txAbortDeniedIfEnvClosed() {

assertThatThrownBy(

() -> {

final Txn<ByteBuffer> txnRead = env.txnRead();

env.close();

txnRead.abort();

})

.isInstanceOf(AlreadyClosedException.class);

}

@Test

void txResetDeniedIfEnvClosed() {

assertThatThrownBy(

() -> {

final Txn<ByteBuffer> txnRead = env.txnRead();

env.close();

txnRead.reset();

})

.isInstanceOf(AlreadyClosedException.class);

}

@Test

public void txParent() {

try (Txn<ByteBuffer> txRoot = env.txnWrite();

Txn<ByteBuffer> txChild = env.txn(txRoot)) {

assertThat(txRoot.getParent()).isNull();

assertThat(txChild.getParent()).isEqualTo(txRoot);

}

@Test

void txParentDeniedIfEnvClosed() {

assertThatThrownBy(

() -> {

try (Txn<ByteBuffer> txRoot = env.txnWrite();

Txn<ByteBuffer> txChild = env.txn(txRoot)) {

env.close();

assertThat(txChild.getParent()).isEqualTo(txRoot);

}

})

.isInstanceOf(AlreadyClosedException.class);

}

@Test

void txParentROChildRWIncompatible() {

assertThatThrownBy(

() -> {

try (Txn<ByteBuffer> txRoot = env.txnRead()) {

env.txn(txRoot); // error

}

})

.isInstanceOf(IncompatibleParent.class);

}

@Test

void txParentRWChildROIncompatible() {

assertThatThrownBy(

() -> {

try (Txn<ByteBuffer> txRoot = env.txnWrite()) {

env.txn(txRoot, MDB_RDONLY_TXN); // error

}

})

.isInstanceOf(IncompatibleParent.class);

}

@Test

void txReadOnly() {

try (Txn<ByteBuffer> txn = env.txnRead()) {

assertThat(txn.getParent()).isNull();

assertThat(txn.getState()).isEqualTo(READY);

assertThat(txn.isReadOnly()).isTrue();

txn.checkReady();

txn.checkReadOnly();

txn.reset();

assertThat(txn.getState()).isEqualTo(RESET);

txn.renew();

assertThat(txn.getState()).isEqualTo(READY);

txn.commit();

assertThat(txn.getState()).isEqualTo(DONE);

txn.close();

assertThat(txn.getState()).isEqualTo(RELEASED);

}

@Test

void txReadWrite() {

final Txn<ByteBuffer> txn = env.txnWrite();

assertThat(txn.getParent()).isNull();

assertThat(txn.getState()).isEqualTo(READY);

assertThat(txn.isReadOnly()).isFalse();

txn.checkReady();

txn.checkWritesAllowed();

txn.commit();

assertThat(txn.getState()).isEqualTo(DONE);

txn.close();

assertThat(txn.getState()).isEqualTo(RELEASED);

}

@Test

void txRenewDeniedWithoutPriorReset() {

assertThatThrownBy(

() -> {

try (Txn<ByteBuffer> txn = env.txnRead()) {

txn.renew();

}

})

.isInstanceOf(NotResetException.class);

}

@Test

void txResetDeniedForAlreadyResetTransaction() {

assertThatThrownBy(

() -> {

try (Txn<ByteBuffer> txn = env.txnRead()) {

txn.reset();

txn.renew();

txn.reset();

}

})

.isInstanceOf(ResetException.class);

}

@Test

void txResetDeniedForReadWriteTransaction() {

assertThatThrownBy(

() -> {

try (Txn<ByteBuffer> txn = env.txnWrite()) {

txn.reset();

}

})

.isInstanceOf(ReadOnlyRequiredException.class);

}

@Test

void zeroByteKeysRejected() {

assertThatThrownBy(

() -> {

final Dbi<ByteBuffer> dbi = env.openDbi(DB_1, MDB_CREATE);

final ByteBuffer key = allocateDirect(4);

key.putInt(1);

assertThat(key.remaining()).isEqualTo(0); // because key.flip() skipped

dbi.put(key, bb(2));

})

.isInstanceOf(BadValueSizeException.class);

}

lmdbjava/src/test/java/org/lmdbjava/TxnTest.java at more-cursor-tests · lmdbjava/lmdbjava · GitHub

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