net.openhft.chronicle.map.MapDiagnostics Maven / Gradle / Ivy
/*
* Copyright 2012-2018 Chronicle Map Contributors
*
* 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 net.openhft.chronicle.map;
import java.io.File;
import java.io.IOException;
public final class MapDiagnostics {
private MapDiagnostics() {
}
public static void main(String[] args) throws IOException {
String mapFile = args[0];
try (ChronicleMap map = ChronicleMap.of(Object.class, Object.class)
.createPersistedTo(new File(mapFile))) {
printMapStats(map);
}
}
public static void printMapStats(ChronicleMap map) {
for (int i = 0; i < map.segments(); i++) {
try (MapSegmentContext c = map.segmentContext(i)) {
System.out.printf("segment %d contains %d entries\n", i, c.size());
c.forEachSegmentEntry(e -> System.out.printf("%s, %d bytes -> %s, %d bytes\n",
e.key(), e.key().size(), e.value(), e.value().size()));
}
}
}
}