com.google.gerrit.server.cache.CacheDisplay Maven / Gradle / Ivy
// Copyright (C) 2021 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.server.cache;
import com.google.common.base.Strings;
import java.io.IOException;
import java.io.Writer;
import java.util.Collection;
public class CacheDisplay {
private final Writer stdout;
private final int nw;
private final Collection caches;
public CacheDisplay(Writer stdout, int nw, Collection caches) {
this.stdout = stdout;
this.nw = nw;
this.caches = caches;
}
public CacheDisplay(Writer stdout, Collection caches) {
this(stdout, 30, caches);
}
public void displayCaches() throws IOException {
stdout.write(
String.format( //
"%1s %-" + nw + "s|%-21s| %-5s |%-9s|\n" //
,
"" //
,
"Name" //
,
"Entries" //
,
"AvgGet" //
,
"Hit Ratio" //
));
stdout.write(
String.format( //
"%1s %-" + nw + "s|%6s %6s %7s| %-5s |%-4s %-4s|\n" //
,
"" //
,
"" //
,
"Mem" //
,
"Disk" //
,
"Space" //
,
"" //
,
"Mem" //
,
"Disk" //
));
stdout.write("--");
for (int i = 0; i < nw; i++) {
stdout.write('-');
}
stdout.write("+---------------------+---------+---------+\n");
printMemoryCoreCaches(caches);
printMemoryPluginCaches(caches);
printDiskCaches(caches);
stdout.write('\n');
}
private void printMemoryCoreCaches(Collection caches) throws IOException {
for (CacheInfo cache : caches) {
if (!cache.name.contains("-") && CacheInfo.CacheType.MEM.equals(cache.type)) {
printCache(cache);
}
}
}
private void printMemoryPluginCaches(Collection caches) throws IOException {
for (CacheInfo cache : caches) {
if (cache.name.contains("-") && CacheInfo.CacheType.MEM.equals(cache.type)) {
printCache(cache);
}
}
}
private void printDiskCaches(Collection caches) throws IOException {
for (CacheInfo cache : caches) {
if (CacheInfo.CacheType.DISK.equals(cache.type)) {
printCache(cache);
}
}
}
private void printCache(CacheInfo cache) throws IOException {
stdout.write(
String.format(
"%1s %-" + nw + "s|%6s %6s %7s| %7s |%4s %4s|\n",
CacheInfo.CacheType.DISK.equals(cache.type) ? "D" : "",
cache.name,
nullToEmpty(cache.entries.mem),
nullToEmpty(cache.entries.disk),
Strings.nullToEmpty(cache.entries.space),
Strings.nullToEmpty(cache.averageGet),
formatAsPercent(cache.hitRatio.mem),
formatAsPercent(cache.hitRatio.disk)));
}
private static String nullToEmpty(Long l) {
return l != null ? String.valueOf(l) : "";
}
private static String formatAsPercent(Integer i) {
return i != null ? i + "%" : "";
}
}