/*
* Copyright 2016 the original author or authors.
*
* 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 org.gradle.process.internal.health.memory;
public class DefaultJvmMemoryInfo implements JvmMemoryInfo {
private final long totalMemory; //this does not change
public DefaultJvmMemoryInfo() {
this.totalMemory = Runtime.getRuntime().maxMemory();
}
/**
* Max memory that this process can commit in bytes. Always returns the same value because maximum memory is determined at jvm start.
*/
long getMaxMemory() {
return totalMemory;
}
/**
* Currently committed memory of this process in bytes. May return different value depending on how the heap has expanded. The returned value is <= {@link #getMaxMemory()}
*/
long getCommittedMemory() {
//querying runtime for each invocation
return Runtime.getRuntime().totalMemory();
}
@Override
public JvmMemoryStatus getJvmSnapshot() {
return new JvmMemoryStatusSnapshot(getMaxMemory(), getCommittedMemory());
}
}