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BucketState.java
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/
BucketState.java
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/*-
* ========================LICENSE_START=================================
* Bucket4j
* %%
* Copyright (C) 2015 - 2020 Vladimir Bukhtoyarov
* %%
* 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.
* =========================LICENSE_END==================================
*/
package io.github.bucket4j;
import io.github.bucket4j.distributed.serialization.DeserializationAdapter;
import io.github.bucket4j.distributed.serialization.SerializationAdapter;
import io.github.bucket4j.distributed.versioning.Version;
import java.io.IOException;
public interface BucketState {
BucketState copy();
BucketConfiguration getConfiguration();
void setConfiguration(BucketConfiguration configuration);
BucketState replaceConfiguration(BucketConfiguration newConfiguration, TokensInheritanceStrategy tokensInheritanceStrategy, long currentTimeNanos);
void copyStateFrom(BucketState sourceState);
long getAvailableTokens();
void consume(long toConsume);
long calculateDelayNanosAfterWillBePossibleToConsume(long tokensToConsume, long currentTimeNanos, boolean checkTokensToConsumeShouldBeLessThenCapacity);
long calculateFullRefillingTime(long currentTimeNanos);
void refillAllBandwidth(long currentTimeNanos);
void addTokens(long tokensToAdd);
void reset();
void forceAddTokens(long tokensToAdd);
long getCurrentSize(int bandwidth);
long getRoundingError(int bandwidth);
MathType getMathType();
static BucketState createInitialState(BucketConfiguration configuration, MathType mathType, long currentTimeNanos) {
switch (mathType) {
case INTEGER_64_BITS: return new BucketState64BitsInteger(configuration, currentTimeNanos);
case IEEE_754: return new BucketStateIEEE754(configuration, currentTimeNanos);
default: throw new IllegalStateException("Unsupported mathType:" + mathType);
}
}
static <S> BucketState deserialize(DeserializationAdapter<S> adapter, S input, Version backwardCompatibilityVersion) throws IOException {
int typeId = adapter.readInt(input);
if (typeId == BucketState64BitsInteger.SERIALIZATION_HANDLE.getTypeId()) {
return BucketState64BitsInteger.SERIALIZATION_HANDLE.deserialize(adapter, input, backwardCompatibilityVersion);
} else if (typeId == BucketStateIEEE754.SERIALIZATION_HANDLE.getTypeId()) {
return BucketStateIEEE754.SERIALIZATION_HANDLE.deserialize(adapter, input, backwardCompatibilityVersion);
} else {
throw new IOException("Unknown typeId=" + typeId);
}
}
static <O> void serialize(SerializationAdapter<O> adapter, O output, BucketState state, Version backwardCompatibilityVersion) throws IOException {
switch (state.getMathType()) {
case INTEGER_64_BITS:
adapter.writeInt(output, BucketState64BitsInteger.SERIALIZATION_HANDLE.getTypeId());
BucketState64BitsInteger.SERIALIZATION_HANDLE.serialize(adapter, output, (BucketState64BitsInteger) state, backwardCompatibilityVersion);
break;
case IEEE_754:
adapter.writeInt(output, BucketStateIEEE754.SERIALIZATION_HANDLE.getTypeId());
BucketStateIEEE754.SERIALIZATION_HANDLE.serialize(adapter, output, (BucketStateIEEE754) state, backwardCompatibilityVersion);
break;
default:
throw new IOException("Unknown mathType=" + state.getMathType());
}
}
}