zipkin2.server.internal.health.ComponentHealth Maven / Gradle / Ivy
/*
* Copyright The OpenZipkin Authors
* SPDX-License-Identifier: Apache-2.0
*/
package zipkin2.server.internal.health;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import zipkin2.Call;
import zipkin2.CheckResult;
import zipkin2.Component;
import zipkin2.internal.ClosedComponentException;
import zipkin2.internal.Nullable;
final class ComponentHealth {
static final Logger LOGGER = LoggerFactory.getLogger(ComponentHealth.class);
static final String STATUS_UP = "UP", STATUS_DOWN = "DOWN";
static ComponentHealth ofComponent(Component component) {
Throwable t = null;
try {
CheckResult check = component.check();
if (!check.ok()) t = check.error();
} catch (Throwable unexpected) {
Call.propagateIfFatal(unexpected);
t = unexpected;
}
if (t == null) return new ComponentHealth(component.toString(), STATUS_UP, null);
String message = t.getMessage();
String error;
if (t instanceof ClosedComponentException) {
error = message;
} else {
error = t.getClass().getSimpleName() + (message != null ? ": " + message : "");
}
LOGGER.debug(error);
return new ComponentHealth(component.toString(), STATUS_DOWN, error);
}
final String name;
final String status;
@Nullable final String error;
ComponentHealth(String name, String status, String error) {
this.name = name;
this.status = status;
this.error = error;
}
}