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/*
* 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.lettuce;
import io.lettuce.core.api.async.RedisScriptingAsyncCommands;
import java.util.Arrays;
import java.util.List;
import org.springframework.core.convert.converter.Converter;
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() {
connection.invoke().just(RedisScriptingAsyncCommands::scriptFlush);
}
/*
* (non-Javadoc)
* @see org.springframework.data.redis.connection.RedisScriptingCommands#scriptKill()
*/
@Override
public void scriptKill() {
if (connection.isQueueing()) {
throw new UnsupportedOperationException("Script kill not permitted in a transaction");
}
connection.invoke().just(RedisScriptingAsyncCommands::scriptKill);
}
/*
* (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!");
return connection.invoke().just(RedisScriptingAsyncCommands::scriptLoad, script);
}
/*
* (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!");
return connection.invoke().just(RedisScriptingAsyncCommands::scriptExists, scriptSha1);
}
/*
* (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!");
byte[][] keys = extractScriptKeys(numKeys, keysAndArgs);
byte[][] args = extractScriptArgs(numKeys, keysAndArgs);
String convertedScript = LettuceConverters.toString(script);
return connection
.invoke().from(RedisScriptingAsyncCommands::eval, convertedScript,
LettuceConverters.toScriptOutputType(returnType), keys, args)
.get(new LettuceEvalResultsConverter(returnType));
}
/*
* (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!");
byte[][] keys = extractScriptKeys(numKeys, keysAndArgs);
byte[][] args = extractScriptArgs(numKeys, keysAndArgs);
return connection
.invoke().from(RedisScriptingAsyncCommands::evalsha, scriptSha1,
LettuceConverters.toScriptOutputType(returnType), keys, args)
.get(new LettuceEvalResultsConverter(returnType));
}
/*
* (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 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