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OperationMode.java
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OperationMode.java
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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.client.indexlifecycle;
import org.elasticsearch.action.admin.indices.shrink.ShrinkAction;
import java.util.EnumSet;
import java.util.Locale;
/**
* Enum representing the different modes that Index Lifecycle Service can operate in.
*/
public enum OperationMode {
/**
* This represents a state where no policies are executed
*/
STOPPED {
@Override
public boolean isValidChange(OperationMode nextMode) {
return nextMode == RUNNING;
}
},
/**
* this represents a state where only sensitive actions (like {@link ShrinkAction}) will be executed
* until they finish, at which point the operation mode will move to <code>STOPPED</code>.
*/
STOPPING {
@Override
public boolean isValidChange(OperationMode nextMode) {
return nextMode == RUNNING || nextMode == STOPPED;
}
},
/**
* Normal operation where all policies are executed as normal.
*/
RUNNING {
@Override
public boolean isValidChange(OperationMode nextMode) {
return nextMode == STOPPING;
}
};
public abstract boolean isValidChange(OperationMode nextMode);
static OperationMode fromString(String string) {
return EnumSet.allOf(OperationMode.class).stream()
.filter(e -> string.equalsIgnoreCase(e.name())).findFirst()
.orElseThrow(() -> new IllegalArgumentException(String.format(Locale.ROOT, "%s is not a valid operation_mode", string)));
}
}