oshi.hardware.platform.unix.aix.AixHWDiskStore Maven / Gradle / Ivy
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/*
* Copyright 2020-2022 The OSHI Project Contributors
* SPDX-License-Identifier: MIT
*/
package oshi.hardware.platform.unix.aix;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.function.Supplier;
import java.util.stream.Collectors;
import com.sun.jna.Native;
import com.sun.jna.platform.unix.aix.Perfstat.perfstat_disk_t;
import oshi.annotation.concurrent.ThreadSafe;
import oshi.driver.unix.aix.Ls;
import oshi.driver.unix.aix.Lscfg;
import oshi.driver.unix.aix.Lspv;
import oshi.hardware.HWDiskStore;
import oshi.hardware.HWPartition;
import oshi.hardware.common.AbstractHWDiskStore;
import oshi.util.Constants;
import oshi.util.tuples.Pair;
/**
* AIX hard disk implementation.
*/
@ThreadSafe
public final class AixHWDiskStore extends AbstractHWDiskStore {
private final Supplier diskStats;
private long reads = 0L;
private long readBytes = 0L;
private long writes = 0L;
private long writeBytes = 0L;
private long currentQueueLength = 0L;
private long transferTime = 0L;
private long timeStamp = 0L;
private List partitionList;
private AixHWDiskStore(String name, String model, String serial, long size, Supplier diskStats) {
super(name, model, serial, size);
this.diskStats = diskStats;
}
@Override
public synchronized long getReads() {
return reads;
}
@Override
public synchronized long getReadBytes() {
return readBytes;
}
@Override
public synchronized long getWrites() {
return writes;
}
@Override
public synchronized long getWriteBytes() {
return writeBytes;
}
@Override
public synchronized long getCurrentQueueLength() {
return currentQueueLength;
}
@Override
public synchronized long getTransferTime() {
return transferTime;
}
@Override
public synchronized long getTimeStamp() {
return timeStamp;
}
@Override
public List getPartitions() {
return this.partitionList;
}
@Override
public synchronized boolean updateAttributes() {
long now = System.currentTimeMillis();
for (perfstat_disk_t stat : diskStats.get()) {
String name = Native.toString(stat.name);
if (name.equals(this.getName())) {
// we only have total transfers so estimate read/write ratio from blocks
long blks = stat.rblks + stat.wblks;
if (blks == 0L) {
this.reads = stat.xfers;
this.writes = 0L;
} else {
long approximateReads = Math.round(stat.xfers * stat.rblks / (double) blks);
long approximateWrites = stat.xfers - approximateReads;
// Enforce monotonic increase
if (approximateReads > this.reads) {
this.reads = approximateReads;
}
if (approximateWrites > this.writes) {
this.writes = approximateWrites;
}
}
this.readBytes = stat.rblks * stat.bsize;
this.writeBytes = stat.wblks * stat.bsize;
this.currentQueueLength = stat.qdepth;
this.transferTime = stat.time;
this.timeStamp = now;
return true;
}
}
return false;
}
/**
* Gets the disks on this machine
*
* @param diskStats Memoized supplier of disk statistics
*
* @return a list of {@link HWDiskStore} objects representing the disks
*/
public static List getDisks(Supplier diskStats) {
Map> majMinMap = Ls.queryDeviceMajorMinor();
List storeList = new ArrayList<>();
for (perfstat_disk_t disk : diskStats.get()) {
String storeName = Native.toString(disk.name);
Pair ms = Lscfg.queryModelSerial(storeName);
String model = ms.getA() == null ? Native.toString(disk.description) : ms.getA();
String serial = ms.getB() == null ? Constants.UNKNOWN : ms.getB();
storeList.add(createStore(storeName, model, serial, disk.size << 20, diskStats, majMinMap));
}
return storeList.stream()
.sorted(Comparator.comparingInt(
s -> s.getPartitions().isEmpty() ? Integer.MAX_VALUE : s.getPartitions().get(0).getMajor()))
.collect(Collectors.toList());
}
private static AixHWDiskStore createStore(String diskName, String model, String serial, long size,
Supplier diskStats, Map> majMinMap) {
AixHWDiskStore store = new AixHWDiskStore(diskName, model.isEmpty() ? Constants.UNKNOWN : model, serial, size,
diskStats);
store.partitionList = Collections.unmodifiableList(Lspv.queryLogicalVolumes(diskName, majMinMap).stream()
.sorted(Comparator.comparing(HWPartition::getMinor).thenComparing(HWPartition::getName))
.collect(Collectors.toList()));
store.updateAttributes();
return store;
}
}