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org.springframework.data.redis.connection.lettuce.LettuceScriptingCommands Maven / Gradle / Ivy
/*
* Copyright 2017-2018 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
*
* 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.springframework.data.redis.connection.lettuce;
import io.lettuce.core.cluster.api.async.RedisClusterAsyncCommands;
import io.lettuce.core.cluster.api.sync.RedisClusterCommands;
import java.util.Arrays;
import java.util.List;
import org.springframework.core.convert.converter.Converter;
import org.springframework.dao.DataAccessException;
import org.springframework.data.redis.connection.RedisScriptingCommands;
import org.springframework.data.redis.connection.ReturnType;
import org.springframework.util.Assert;
/**
* @author Mark Paluch
* @since 2.0
*/
class LettuceScriptingCommands implements RedisScriptingCommands {
private final LettuceConnection connection;
LettuceScriptingCommands(LettuceConnection connection) {
this.connection = connection;
}
/*
* (non-Javadoc)
* @see org.springframework.data.redis.connection.RedisScriptingCommands#scriptFlush()
*/
@Override
public void scriptFlush() {
try {
if (isPipelined()) {
pipeline(connection.newLettuceStatusResult(getAsyncConnection().scriptFlush()));
return;
}
if (isQueueing()) {
transaction(connection.newLettuceStatusResult(getAsyncConnection().scriptFlush()));
return;
}
getConnection().scriptFlush();
} catch (Exception ex) {
throw convertLettuceAccessException(ex);
}
}
/*
* (non-Javadoc)
* @see org.springframework.data.redis.connection.RedisScriptingCommands#scriptKill()
*/
@Override
public void scriptKill() {
if (isQueueing()) {
throw new UnsupportedOperationException("Script kill not permitted in a transaction");
}
try {
if (isPipelined()) {
pipeline(connection.newLettuceStatusResult(getAsyncConnection().scriptKill()));
return;
}
getConnection().scriptKill();
} catch (Exception ex) {
throw convertLettuceAccessException(ex);
}
}
/*
* (non-Javadoc)
* @see org.springframework.data.redis.connection.RedisScriptingCommands#scriptLoad(byte[])
*/
@Override
public String scriptLoad(byte[] script) {
Assert.notNull(script, "Script must not be null!");
try {
if (isPipelined()) {
pipeline(connection.newLettuceResult(getAsyncConnection().scriptLoad(script)));
return null;
}
if (isQueueing()) {
transaction(connection.newLettuceResult(getAsyncConnection().scriptLoad(script)));
return null;
}
return getConnection().scriptLoad(script);
} catch (Exception ex) {
throw convertLettuceAccessException(ex);
}
}
/*
* (non-Javadoc)
* @see org.springframework.data.redis.connection.RedisScriptingCommands#scriptExists(java.lang.String[])
*/
@Override
public List scriptExists(String... scriptSha1) {
Assert.notNull(scriptSha1, "Script digests must not be null!");
Assert.noNullElements(scriptSha1, "Script digests must not contain null elements!");
try {
if (isPipelined()) {
pipeline(connection.newLettuceResult(getAsyncConnection().scriptExists(scriptSha1)));
return null;
}
if (isQueueing()) {
transaction(connection.newLettuceResult(getAsyncConnection().scriptExists(scriptSha1)));
return null;
}
return getConnection().scriptExists(scriptSha1);
} catch (Exception ex) {
throw convertLettuceAccessException(ex);
}
}
/*
* (non-Javadoc)
* @see org.springframework.data.redis.connection.RedisScriptingCommands#eval(byte[], org.springframework.data.redis.connection.ReturnType, int, byte[][])
*/
@Override
public T eval(byte[] script, ReturnType returnType, int numKeys, byte[]... keysAndArgs) {
Assert.notNull(script, "Script must not be null!");
try {
byte[][] keys = extractScriptKeys(numKeys, keysAndArgs);
byte[][] args = extractScriptArgs(numKeys, keysAndArgs);
String convertedScript = LettuceConverters.toString(script);
if (isPipelined()) {
pipeline(connection.newLettuceResult(
getAsyncConnection().eval(convertedScript, LettuceConverters.toScriptOutputType(returnType), keys, args),
new LettuceEvalResultsConverter(returnType)));
return null;
}
if (isQueueing()) {
transaction(connection.newLettuceResult(
getAsyncConnection().eval(convertedScript, LettuceConverters.toScriptOutputType(returnType), keys, args),
new LettuceEvalResultsConverter(returnType)));
return null;
}
return new LettuceEvalResultsConverter(returnType)
.convert(getConnection().eval(convertedScript, LettuceConverters.toScriptOutputType(returnType), keys, args));
} catch (Exception ex) {
throw convertLettuceAccessException(ex);
}
}
/*
* (non-Javadoc)
* @see org.springframework.data.redis.connection.RedisScriptingCommands#evalSha(java.lang.String, org.springframework.data.redis.connection.ReturnType, int, byte[][])
*/
@Override
public T evalSha(String scriptSha1, ReturnType returnType, int numKeys, byte[]... keysAndArgs) {
Assert.notNull(scriptSha1, "Script digest must not be null!");
try {
byte[][] keys = extractScriptKeys(numKeys, keysAndArgs);
byte[][] args = extractScriptArgs(numKeys, keysAndArgs);
if (isPipelined()) {
pipeline(connection.newLettuceResult(
getAsyncConnection().evalsha(scriptSha1, LettuceConverters.toScriptOutputType(returnType), keys, args),
new LettuceEvalResultsConverter(returnType)));
return null;
}
if (isQueueing()) {
transaction(connection.newLettuceResult(
getAsyncConnection().evalsha(scriptSha1, LettuceConverters.toScriptOutputType(returnType), keys, args),
new LettuceEvalResultsConverter(returnType)));
return null;
}
return new LettuceEvalResultsConverter(returnType)
.convert(getConnection().evalsha(scriptSha1, LettuceConverters.toScriptOutputType(returnType), keys, args));
} catch (Exception ex) {
throw convertLettuceAccessException(ex);
}
}
/*
* (non-Javadoc)
* @see org.springframework.data.redis.connection.RedisScriptingCommands#evalSha(byte[], org.springframework.data.redis.connection.ReturnType, int, byte[][])
*/
@Override
public T evalSha(byte[] scriptSha1, ReturnType returnType, int numKeys, byte[]... keysAndArgs) {
Assert.notNull(scriptSha1, "Script digest must not be null!");
return evalSha(LettuceConverters.toString(scriptSha1), returnType, numKeys, keysAndArgs);
}
private boolean isPipelined() {
return connection.isPipelined();
}
private boolean isQueueing() {
return connection.isQueueing();
}
private void pipeline(LettuceResult result) {
connection.pipeline(result);
}
private void transaction(LettuceResult result) {
connection.transaction(result);
}
private RedisClusterAsyncCommands getAsyncConnection() {
return connection.getAsyncConnection();
}
public RedisClusterCommands getConnection() {
return connection.getConnection();
}
private DataAccessException convertLettuceAccessException(Exception ex) {
return connection.convertLettuceAccessException(ex);
}
private static byte[][] extractScriptKeys(int numKeys, byte[]... keysAndArgs) {
if (numKeys > 0) {
return Arrays.copyOfRange(keysAndArgs, 0, numKeys);
}
return new byte[0][0];
}
private static byte[][] extractScriptArgs(int numKeys, byte[]... keysAndArgs) {
if (keysAndArgs.length > numKeys) {
return Arrays.copyOfRange(keysAndArgs, numKeys, keysAndArgs.length);
}
return new byte[0][0];
}
private class LettuceEvalResultsConverter implements Converter {
private ReturnType returnType;
public LettuceEvalResultsConverter(ReturnType returnType) {
this.returnType = returnType;
}
@SuppressWarnings({ "rawtypes", "unchecked" })
public T convert(Object source) {
if (returnType == ReturnType.MULTI) {
List resultList = (List) source;
for (Object obj : resultList) {
if (obj instanceof Exception) {
throw convertLettuceAccessException((Exception) obj);
}
}
}
return (T) source;
}
}
}
