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// Copyright (C) 2009 The Android Open Source Project
//
// 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.google.gerrit.sshd.commands;
import com.google.gerrit.sshd.AdminCommand;
import net.sf.ehcache.Ehcache;
import net.sf.ehcache.Statistics;
import net.sf.ehcache.config.CacheConfiguration;
import org.apache.sshd.server.Environment;
import org.eclipse.jgit.storage.file.WindowCacheStatAccessor;
import java.io.PrintWriter;
/** Show the current cache states. */
@AdminCommand
final class AdminShowCaches extends CacheCommand {
private PrintWriter p;
@Override
public void start(final Environment env) {
startThread(new CommandRunnable() {
@Override
public void run() throws Exception {
parseCommandLine();
display();
}
});
}
private void display() {
p = toPrintWriter(out);
p.print(String.format(//
"%1s %-18s %-4s|%-20s| %-5s |%-14s|\n" //
, "" //
, "Name" //
, "Max" //
, "Object Count" //
, "AvgGet" //
, "Hit Ratio" //
));
p.print(String.format(//
"%1s %-18s %-4s|%6s %6s %6s| %-5s |%-4s %-4s %-4s|\n" //
, "" //
, "" //
, "Age" //
, "Disk" //
, "Mem" //
, "Cnt" //
, "" //
, "Disk" //
, "Mem" //
, "Agg" //
));
p.println("------------------"
+ "-------+--------------------+----------+--------------+");
for (final Ehcache cache : getAllCaches()) {
final CacheConfiguration cfg = cache.getCacheConfiguration();
final boolean useDisk = cfg.isDiskPersistent() || cfg.isOverflowToDisk();
final Statistics stat = cache.getStatistics();
final long total = stat.getCacheHits() + stat.getCacheMisses();
if (useDisk) {
p.print(String.format(//
"D %-18s %-4s|%6s %6s %6s| %7s |%4s %4s %4s|\n" //
, cache.getName() //
, interval(cfg.getTimeToLiveSeconds()) //
, count(stat.getDiskStoreObjectCount()) //
, count(stat.getMemoryStoreObjectCount()) //
, count(stat.getObjectCount()) //
, duration(stat.getAverageGetTime()) //
, percent(stat.getOnDiskHits(), total) //
, percent(stat.getInMemoryHits(), total) //
, percent(stat.getCacheHits(), total) //
));
} else {
p.print(String.format(//
" %-18s %-4s|%6s %6s %6s| %7s |%4s %4s %4s|\n" //
, cache.getName() //
, interval(cfg.getTimeToLiveSeconds()) //
, "", "" //
, count(stat.getObjectCount()) //
, duration(stat.getAverageGetTime()) //
, "", "" //
, percent(stat.getCacheHits(), total) //
));
}
}
p.println();
final Runtime r = Runtime.getRuntime();
final long mMax = r.maxMemory();
final long mFree = r.freeMemory();
final long mTotal = r.totalMemory();
final long mInuse = mTotal - mFree;
final long jgitBytes = WindowCacheStatAccessor.getOpenBytes();
p.println("JGit Buffer Cache:");
fItemCount("open files", WindowCacheStatAccessor.getOpenFiles());
fByteCount("loaded", jgitBytes);
fPercent("mem%", jgitBytes, mTotal);
p.println();
p.println("JVM Heap:");
fByteCount("max", mMax);
fByteCount("inuse", mInuse);
fPercent("mem%", mInuse, mTotal);
p.println();
p.flush();
}
private void fItemCount(final String name, final long value) {
p.println(String.format(" %1$-12s: %2$15d", name, value));
}
private void fByteCount(final String name, double value) {
String suffix = "bytes";
if (value > 1024) {
value /= 1024;
suffix = "kb";
}
if (value > 1024) {
value /= 1024;
suffix = "mb";
}
if (value > 1024) {
value /= 1024;
suffix = "gb";
}
p.println(String.format(" %1$-12s: %2$6.2f %3$s", name, value, suffix));
}
private String count(long cnt) {
if (cnt == 0) {
return "";
}
return String.format("%6d", cnt);
}
private String duration(double ms) {
if (Math.abs(ms) <= 0.05) {
return "";
}
String suffix = "ms";
if (ms >= 1000) {
ms /= 1000;
suffix = "s ";
}
return String.format("%4.1f%s", ms, suffix);
}
private String interval(double ttl) {
if (ttl == 0) {
return "inf";
}
String suffix = "s";
if (ttl >= 60) {
ttl /= 60;
suffix = "m";
if (ttl >= 60) {
ttl /= 60;
suffix = "h";
}
if (ttl >= 24) {
ttl /= 24;
suffix = "d";
if (ttl >= 365) {
ttl /= 365;
suffix = "y";
}
}
}
return Integer.toString((int) ttl) + suffix;
}
private String percent(final long value, final long total) {
if (total <= 0) {
return "";
}
final long pcent = (100 * value) / total;
return String.format("%3d%%", (int) pcent);
}
private void fPercent(final String name, final long value, final long total) {
final long pcent = 0 < total ? (100 * value) / total : 0;
p.println(String.format(" %1$-12s: %2$3d%%", name, (int) pcent));
}
}
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