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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.dubbo.qos.probe;
import org.apache.dubbo.common.extension.ExtensionScope;
import org.apache.dubbo.common.extension.SPI;
/**
* A probe to indicate whether program is startup
*
* If one or more spi return false, 'startup' command in dubbo-qos
* will return false. This can be extended with custom program and developers
* can implement this to customize life cycle.
*
* @since 3.0
*/
@SPI(scope = ExtensionScope.FRAMEWORK)
public interface StartupProbe {
/**
* Check if program has been startup
*
* @return {@link boolean} result of probe
*/
boolean check();
}