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uniVocity's open source parsers for processing different text formats using a consistent API
/*******************************************************************************
* Copyright 2015 uniVocity Software Pty Ltd
*
* 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 com.univocity.parsers.common.processor;
import com.univocity.parsers.common.*;
import com.univocity.parsers.common.processor.core.*;
/**
* A {@link RowProcessor} implementation to perform row processing tasks in parallel. The {@code ConcurrentRowProcessor} wraps another {@link RowProcessor}, and collects rows read from the input.
* The actual row processing is performed in by wrapped {@link RowProcessor} in a separate thread.
*
* @author uniVocity Software Pty Ltd - [email protected]
* @see AbstractParser
* @see RowProcessor
*/
public class ConcurrentRowProcessor extends AbstractConcurrentProcessor implements RowProcessor {
/**
* Creates a non-blocking {@code ConcurrentRowProcessor}, to perform processing of rows parsed from the input in a separate thread.
*
* @param rowProcessor a regular {@link RowProcessor} implementation which will be executed in a separate thread.
*/
public ConcurrentRowProcessor(RowProcessor rowProcessor) {
super(rowProcessor);
}
/**
* Creates a blocking {@code ConcurrentRowProcessor}, to perform processing of rows parsed from the input in a separate thread.
*
* @param rowProcessor a regular {@link RowProcessor} implementation which will be executed in a separate thread.
* @param limit the limit of rows to be kept in memory before the input parsing process is blocked.
*/
public ConcurrentRowProcessor(RowProcessor rowProcessor, int limit) {
super(rowProcessor, limit);
}
@Override
protected ParsingContext copyContext(ParsingContext context) {
return new ParsingContextSnapshot(context);
}
@Override
protected ParsingContext wrapContext(ParsingContext context) {
return new ParsingContextWrapper(context) {
@Override
public long currentRecord() {
return getRowCount();
}
};
}
}