79 lines
2.1 KiB
Java
79 lines
2.1 KiB
Java
package it.cavallium.dbengine.utils;
|
|
|
|
import it.cavallium.dbengine.MetricUtils;
|
|
import it.cavallium.dbengine.database.SafeCloseable;
|
|
import java.lang.ref.Cleaner;
|
|
import java.util.concurrent.atomic.AtomicBoolean;
|
|
import org.apache.logging.log4j.LogManager;
|
|
import org.apache.logging.log4j.Logger;
|
|
|
|
public abstract class SimpleResource implements SafeCloseable {
|
|
|
|
protected static final boolean ENABLE_LEAK_DETECTION
|
|
= Boolean.parseBoolean(System.getProperty("it.cavallium.dbengine.leakdetection.enable", "true"));
|
|
protected static final boolean ADVANCED_LEAK_DETECTION
|
|
= Boolean.parseBoolean(System.getProperty("it.cavallium.dbengine.leakdetection.advanced", "false"));
|
|
private static final Logger LOG = LogManager.getLogger(SimpleResource.class);
|
|
public static final Cleaner CLEANER = Cleaner.create();
|
|
|
|
private final AtomicBoolean closed;
|
|
private final boolean canClose;
|
|
|
|
public SimpleResource() {
|
|
this(true);
|
|
}
|
|
|
|
protected SimpleResource(boolean canClose) {
|
|
this(canClose, new AtomicBoolean());
|
|
}
|
|
|
|
protected SimpleResource(AtomicBoolean closed) {
|
|
this(true, closed);
|
|
}
|
|
|
|
private SimpleResource(boolean canClose, AtomicBoolean closed) {
|
|
this.canClose = canClose;
|
|
this.closed = closed;
|
|
|
|
if (ENABLE_LEAK_DETECTION && canClose) {
|
|
var resourceClass = this.getClass();
|
|
Exception initializationStackTrace;
|
|
if (ADVANCED_LEAK_DETECTION) {
|
|
var stackTrace = Thread.currentThread().getStackTrace();
|
|
initializationStackTrace = new Exception("Initialization point");
|
|
initializationStackTrace.setStackTrace(stackTrace);
|
|
} else {
|
|
initializationStackTrace = null;
|
|
}
|
|
CLEANER.register(this, () -> {
|
|
if (!closed.get()) {
|
|
LOG.error("Resource leak of type {}", resourceClass, initializationStackTrace);
|
|
}
|
|
});
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public final void close() {
|
|
if (canClose && closed.compareAndSet(false, true)) {
|
|
onClose();
|
|
}
|
|
}
|
|
|
|
protected boolean isClosed() {
|
|
return canClose && closed.get();
|
|
}
|
|
|
|
protected AtomicBoolean getClosed() {
|
|
return closed;
|
|
}
|
|
|
|
protected void ensureOpen() {
|
|
if (canClose && closed.get()) {
|
|
throw new IllegalStateException("Resource is closed");
|
|
}
|
|
}
|
|
|
|
protected abstract void onClose();
|
|
}
|