spring-data-redis JedisClusterKeyCommands 源码
spring-data-redis JedisClusterKeyCommands 代码
文件路径：/src/main/java/org/springframework/data/redis/connection/jedis/JedisClusterKeyCommands.java
/*
* Copyright 2017-2022 the original author or authors.
*
* 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
*
* https://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.springframework.data.redis.connection.jedis;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.params.ScanParams;
import redis.clients.jedis.resps.ScanResult;
import java.time.Duration;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.ThreadLocalRandom;
import java.util.concurrent.TimeUnit;
import org.springframework.dao.DataAccessException;
import org.springframework.dao.InvalidDataAccessApiUsageException;
import org.springframework.data.redis.connection.ClusterSlotHashUtil;
import org.springframework.data.redis.connection.DataType;
import org.springframework.data.redis.connection.RedisClusterNode;
import org.springframework.data.redis.connection.RedisKeyCommands;
import org.springframework.data.redis.connection.RedisNode;
import org.springframework.data.redis.connection.SortParameters;
import org.springframework.data.redis.connection.ValueEncoding;
import org.springframework.data.redis.connection.convert.Converters;
import org.springframework.data.redis.connection.jedis.JedisClusterConnection.JedisClusterCommandCallback;
import org.springframework.data.redis.connection.jedis.JedisClusterConnection.JedisMultiKeyClusterCommandCallback;
import org.springframework.data.redis.core.Cursor;
import org.springframework.data.redis.core.ScanCursor;
import org.springframework.data.redis.core.ScanIteration;
import org.springframework.data.redis.core.ScanOptions;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.util.ObjectUtils;
/**
* @author Christoph Strobl
* @author Mark Paluch
* @author ihaohong
* @author Dan Smith
* @since 2.0
*/
class JedisClusterKeyCommands implements RedisKeyCommands {
private final JedisClusterConnection connection;
JedisClusterKeyCommands(JedisClusterConnection connection) {
this.connection = connection;
}
@Override
public Boolean copy(byte[] sourceKey, byte[] targetKey, boolean replace) {
Assert.notNull(sourceKey, "source key must not be null");
Assert.notNull(targetKey, "target key must not be null");
return connection.getCluster().copy(sourceKey, targetKey, replace);
}
@Override
public Long del(byte[]... keys) {
Assert.notNull(keys, "Keys must not be null");
Assert.noNullElements(keys, "Keys must not contain null elements");
if (ClusterSlotHashUtil.isSameSlotForAllKeys(keys)) {
try {
return connection.getCluster().del(keys);
} catch (Exception ex) {
throw convertJedisAccessException(ex);
}
}
return (long) connection.getClusterCommandExecutor()
.executeMultiKeyCommand((JedisMultiKeyClusterCommandCallback<Long>) (client, key) -> client.del(key),
Arrays.asList(keys))
.resultsAsList().size();
}
@Nullable
@Override
public Long unlink(byte[]... keys) {
Assert.notNull(keys, "Keys must not be null");
return connection.<Long> execute("UNLINK", Arrays.asList(keys), Collections.emptyList()).stream()
.mapToLong(val -> val).sum();
}
@Override
public DataType type(byte[] key) {
Assert.notNull(key, "Key must not be null");
try {
return JedisConverters.toDataType(connection.getCluster().type(key));
} catch (Exception ex) {
throw convertJedisAccessException(ex);
}
}
@Nullable
@Override
public Long touch(byte[]... keys) {
Assert.notNull(keys, "Keys must not be null");
return connection.<Long> execute("TOUCH", Arrays.asList(keys), Collections.emptyList()).stream()
.mapToLong(val -> val).sum();
}
@Override
public Set<byte[]> keys(byte[] pattern) {
Assert.notNull(pattern, "Pattern must not be null");
Collection<Set<byte[]>> keysPerNode = connection.getClusterCommandExecutor()
.executeCommandOnAllNodes((JedisClusterCommandCallback<Set<byte[]>>) client -> client.keys(pattern))
.resultsAsList();
Set<byte[]> keys = new HashSet<>();
for (Set<byte[]> keySet : keysPerNode) {
keys.addAll(keySet);
}
return keys;
}
public Set<byte[]> keys(RedisClusterNode node, byte[] pattern) {
Assert.notNull(node, "RedisClusterNode must not be null");
Assert.notNull(pattern, "Pattern must not be null");
return connection.getClusterCommandExecutor()
.executeCommandOnSingleNode((JedisClusterCommandCallback<Set<byte[]>>) client -> client.keys(pattern), node)
.getValue();
}
@Override
public Cursor<byte[]> scan(ScanOptions options) {
throw new InvalidDataAccessApiUsageException("Scan is not supported across multiple nodes within a cluster");
}
/**
* Use a {@link Cursor} to iterate over keys stored at the given {@link RedisClusterNode}.
*
* @param node must not be {@literal null}.
* @param options must not be {@literal null}.
* @return never {@literal null}.
* @since 2.1
*/
Cursor<byte[]> scan(RedisClusterNode node, ScanOptions options) {
Assert.notNull(node, "RedisClusterNode must not be null");
Assert.notNull(options, "Options must not be null");
return connection.getClusterCommandExecutor()
.executeCommandOnSingleNode((JedisClusterCommandCallback<Cursor<byte[]>>) client -> {
return new ScanCursor<byte[]>(0, options) {
@Override
protected ScanIteration<byte[]> doScan(long cursorId, ScanOptions options) {
ScanParams params = JedisConverters.toScanParams(options);
ScanResult<String> result = client.scan(Long.toString(cursorId), params);
return new ScanIteration<>(Long.valueOf(result.getCursor()),
JedisConverters.stringListToByteList().convert(result.getResult()));
}
}.open();
}, node).getValue();
}
@Override
public byte[] randomKey() {
List<RedisClusterNode> nodes = new ArrayList<>(
connection.getTopologyProvider().getTopology().getActiveMasterNodes());
Set<RedisNode> inspectedNodes = new HashSet<>(nodes.size());
do {
RedisClusterNode node = nodes.get(ThreadLocalRandom.current().nextInt(nodes.size()));
while (inspectedNodes.contains(node)) {
node = nodes.get(ThreadLocalRandom.current().nextInt(nodes.size()));
}
inspectedNodes.add(node);
byte[] key = randomKey(node);
if (key != null && key.length > 0) {
return key;
}
} while (nodes.size() != inspectedNodes.size());
return null;
}
public byte[] randomKey(RedisClusterNode node) {
Assert.notNull(node, "RedisClusterNode must not be null");
return connection.getClusterCommandExecutor()
.executeCommandOnSingleNode((JedisClusterCommandCallback<byte[]>) client -> client.randomBinaryKey(), node)
.getValue();
}
@Override
public void rename(byte[] oldKey, byte[] newKey) {
Assert.notNull(oldKey, "Old key must not be null");
Assert.notNull(newKey, "New key must not be null");
if (ClusterSlotHashUtil.isSameSlotForAllKeys(oldKey, newKey)) {
try {
connection.getCluster().rename(oldKey, newKey);
return;
} catch (Exception ex) {
throw convertJedisAccessException(ex);
}
}
byte[] value = dump(oldKey);
if (value != null && value.length > 0) {
restore(newKey, 0, value, true);
del(oldKey);
}
}
@Override
public Boolean renameNX(byte[] sourceKey, byte[] targetKey) {
Assert.notNull(sourceKey, "Source key must not be null");
Assert.notNull(targetKey, "Target key must not be null");
if (ClusterSlotHashUtil.isSameSlotForAllKeys(sourceKey, targetKey)) {
try {
return JedisConverters.toBoolean(connection.getCluster().renamenx(sourceKey, targetKey));
} catch (Exception ex) {
throw convertJedisAccessException(ex);
}
}
byte[] value = dump(sourceKey);
if (value != null && value.length > 0 && !exists(targetKey)) {
restore(targetKey, 0, value);
del(sourceKey);
return Boolean.TRUE;
}
return Boolean.FALSE;
}
@Override
public Boolean expire(byte[] key, long seconds) {
Assert.notNull(key, "Key must not be null");
try {
return JedisConverters.toBoolean(connection.getCluster().expire(key, seconds));
} catch (Exception ex) {
throw convertJedisAccessException(ex);
}
}
@Override
public Boolean pExpire(byte[] key, long millis) {
Assert.notNull(key, "Key must not be null");
try {
return JedisConverters.toBoolean(connection.getCluster().pexpire(key, millis));
} catch (Exception ex) {
throw convertJedisAccessException(ex);
}
}
@Override
public Boolean expireAt(byte[] key, long unixTime) {
Assert.notNull(key, "Key must not be null");
try {
return JedisConverters.toBoolean(connection.getCluster().expireAt(key, unixTime));
} catch (Exception ex) {
throw convertJedisAccessException(ex);
}
}
@Override
public Boolean pExpireAt(byte[] key, long unixTimeInMillis) {
Assert.notNull(key, "Key must not be null");
try {
return JedisConverters.toBoolean(connection.getCluster().pexpireAt(key, unixTimeInMillis));
} catch (Exception ex) {
throw convertJedisAccessException(ex);
}
}
@Override
public Boolean persist(byte[] key) {
Assert.notNull(key, "Key must not be null");
try {
return JedisConverters.toBoolean(connection.getCluster().persist(key));
} catch (Exception ex) {
throw convertJedisAccessException(ex);
}
}
@Override
public Boolean move(byte[] key, int dbIndex) {
throw new InvalidDataAccessApiUsageException("Cluster mode does not allow moving keys");
}
@Override
public Long ttl(byte[] key) {
Assert.notNull(key, "Key must not be null");
try {
return connection.getCluster().ttl(key);
} catch (Exception ex) {
throw convertJedisAccessException(ex);
}
}
@Override
public Long ttl(byte[] key, TimeUnit timeUnit) {
Assert.notNull(key, "Key must not be null");
try {
return Converters.secondsToTimeUnit(connection.getCluster().ttl(key), timeUnit);
} catch (Exception ex) {
throw convertJedisAccessException(ex);
}
}
@Override
public Long pTtl(byte[] key) {
Assert.notNull(key, "Key must not be null");
return connection.getClusterCommandExecutor()
.executeCommandOnSingleNode((JedisClusterCommandCallback<Long>) client -> client.pttl(key),
connection.clusterGetNodeForKey(key))
.getValue();
}
@Override
public Long pTtl(byte[] key, TimeUnit timeUnit) {
Assert.notNull(key, "Key must not be null");
return connection.getClusterCommandExecutor()
.executeCommandOnSingleNode(
(JedisClusterCommandCallback<Long>) client -> Converters.millisecondsToTimeUnit(client.pttl(key), timeUnit),
connection.clusterGetNodeForKey(key))
.getValue();
}
@Override
public byte[] dump(byte[] key) {
Assert.notNull(key, "Key must not be null");
return connection.getClusterCommandExecutor()
.executeCommandOnSingleNode((JedisClusterCommandCallback<byte[]>) client -> client.dump(key),
connection.clusterGetNodeForKey(key))
.getValue();
}
@Override
public void restore(byte[] key, long ttlInMillis, byte[] serializedValue, boolean replace) {
Assert.notNull(key, "Key must not be null");
Assert.notNull(serializedValue, "Serialized value must not be null");
connection.getClusterCommandExecutor().executeCommandOnSingleNode((JedisClusterCommandCallback<String>) client -> {
if (!replace) {
return client.restore(key, ttlInMillis, serializedValue);
}
return JedisConverters.toString(this.connection.execute("RESTORE", key,
Arrays.asList(JedisConverters.toBytes(ttlInMillis), serializedValue, JedisConverters.toBytes("REPLACE"))));
}, connection.clusterGetNodeForKey(key));
}
@Override
public List<byte[]> sort(byte[] key, SortParameters params) {
Assert.notNull(key, "Key must not be null");
try {
return connection.getCluster().sort(key, JedisConverters.toSortingParams(params));
} catch (Exception ex) {
throw convertJedisAccessException(ex);
}
}
@Override
public Long sort(byte[] key, SortParameters params, byte[] storeKey) {
Assert.notNull(key, "Key must not be null");
if (ClusterSlotHashUtil.isSameSlotForAllKeys(key, storeKey)) {
try {
return connection.getCluster().sort(key, JedisConverters.toSortingParams(params), storeKey);
} catch (Exception ex) {
throw convertJedisAccessException(ex);
}
}
List<byte[]> sorted = sort(key, params);
byte[][] arr = new byte[sorted.size()][];
connection.keyCommands().unlink(storeKey);
connection.listCommands().lPush(storeKey, sorted.toArray(arr));
return (long) sorted.size();
}
@Nullable
@Override
public Long exists(byte[]... keys) {
Assert.notNull(keys, "Keys must not be null");
Assert.noNullElements(keys, "Keys must not contain null elements");
if (ClusterSlotHashUtil.isSameSlotForAllKeys(keys)) {
try {
return connection.getCluster().exists(keys);
} catch (Exception ex) {
throw convertJedisAccessException(ex);
}
}
return connection.getClusterCommandExecutor()
.executeMultiKeyCommand((JedisMultiKeyClusterCommandCallback<Boolean>) Jedis::exists, Arrays.asList(keys))
.resultsAsList().stream().mapToLong(val -> ObjectUtils.nullSafeEquals(val, Boolean.TRUE) ? 1 : 0).sum();
}
@Nullable
@Override
public ValueEncoding encodingOf(byte[] key) {
Assert.notNull(key, "Key must not be null");
return connection.getClusterCommandExecutor()
.executeCommandOnSingleNode((JedisClusterCommandCallback<byte[]>) client -> client.objectEncoding(key),
connection.clusterGetNodeForKey(key))
.mapValue(JedisConverters::toEncoding);
}
@Nullable
@Override
public Duration idletime(byte[] key) {
Assert.notNull(key, "Key must not be null");
return connection.getClusterCommandExecutor()
.executeCommandOnSingleNode((JedisClusterCommandCallback<Long>) client -> client.objectIdletime(key),
connection.clusterGetNodeForKey(key))
.mapValue(Converters::secondsToDuration);
}
@Nullable
@Override
public Long refcount(byte[] key) {
Assert.notNull(key, "Key must not be null");
return connection.getClusterCommandExecutor()
.executeCommandOnSingleNode((JedisClusterCommandCallback<Long>) client -> client.objectRefcount(key),
connection.clusterGetNodeForKey(key))
.getValue();
}
private DataAccessException convertJedisAccessException(Exception ex) {
return connection.convertJedisAccessException(ex);
}
}
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