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oj! Algorithms - ojAlgo - is Open Source Java code that has to do with mathematics, linear algebra and optimisation.
/*
* Copyright 1997-2024 Optimatika
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package org.ojalgo.netio;
import java.io.File;
import java.util.concurrent.ExecutorService;
import java.util.function.IntSupplier;
import org.ojalgo.concurrent.DaemonPoolExecutor;
import org.ojalgo.concurrent.Parallelism;
import org.ojalgo.type.management.MBeanUtils;
import org.ojalgo.type.management.Throughput;
abstract class ReaderWriterBuilder> {
private static volatile ExecutorService EXECUTOR = null;
static ExecutorService executor() {
if (EXECUTOR == null) {
synchronized (ReaderWriterBuilder.class) {
if (EXECUTOR == null) {
EXECUTOR = DaemonPoolExecutor.newCachedThreadPool("ojAlgo IO");
}
}
}
return EXECUTOR;
}
private ExecutorService myExecutor = null;
private final File[] myFiles;
private String myManagerName = null;
private IntSupplier myParallelism = Parallelism.CORES.limit(32);
private int myQueueCapacity = 1024;
private Throughput myStatisticsCollector = null;
ReaderWriterBuilder(final File[] files) {
super();
myFiles = files;
}
public B executor(final ExecutorService executor) {
myExecutor = executor;
return (B) this;
}
public B manager(final String name) {
myManagerName = name;
return (B) this;
}
public B parallelism(final int parallelism) {
return this.parallelism(() -> parallelism);
}
public B parallelism(final IntSupplier parallelism) {
myParallelism = parallelism;
return (B) this;
}
public B queue(final int capacity) {
myQueueCapacity = capacity;
return (B) this;
}
public B statistics(final Throughput collector) {
myStatisticsCollector = collector;
return (B) this;
}
ExecutorService getExecutor() {
if (myExecutor == null) {
myExecutor = ReaderWriterBuilder.executor();
}
return myExecutor;
}
File[] getFiles() {
return myFiles;
}
int getParallelism() {
return myParallelism.getAsInt();
}
int getQueueCapacity() {
return myQueueCapacity;
}
Throughput getStatisticsCollector() {
if (myStatisticsCollector == null && myManagerName != null) {
myStatisticsCollector = new Throughput();
MBeanUtils.register(myStatisticsCollector, myManagerName);
}
return myStatisticsCollector;
}
boolean isStatisticsCollector() {
return (myStatisticsCollector != null || myManagerName != null);
}
}