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Oracle NoSQL Database Client - supplies build and runtime support for the client side of the Oracle NoSQL Database. Note that a running Oracle NoSQL Database Server (store) is required to do anything meaningful with this client.
/*-
*
* This file is part of Oracle NoSQL Database
* Copyright (C) 2011, 2016 Oracle and/or its affiliates. All rights reserved.
*
* If you have received this file as part of Oracle NoSQL Database the
* following applies to the work as a whole:
*
* Oracle NoSQL Database server software is free software: you can
* redistribute it and/or modify it under the terms of the GNU Affero
* General Public License as published by the Free Software Foundation,
* version 3.
*
* Oracle NoSQL Database is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Affero General Public License for more details.
*
* If you have received this file as part of Oracle NoSQL Database Client or
* distributed separately the following applies:
*
* Oracle NoSQL Database client software is free software: you can
* redistribute it and/or modify it under the terms of the Apache License
* as published by the Apache Software Foundation, version 2.0.
*
* You should have received a copy of the GNU Affero General Public License
* and/or the Apache License in the LICENSE file along with Oracle NoSQL
* Database client or server distribution. If not, see
*
* or
* .
*
* An active Oracle commercial licensing agreement for this product supersedes
* these licenses and in such case the license notices, but not the copyright
* notice, may be removed by you in connection with your distribution that is
* in accordance with the commercial licensing terms.
*
* For more information please contact:
*
* [email protected]
*
*/
package oracle.kv.stats;
import java.io.Serializable;
import oracle.kv.KVStore;
/**
* The metrics associated with a node in the KVS.
*/
public interface NodeMetrics extends Serializable {
/**
* Returns the internal name associated with the node. It's unique across
* the KVStore.
*/
public String getNodeName();
/**
* Returns the zone that hosts the node.
*
* @deprecated replaced by {@link #getZoneName}
*/
@Deprecated
public String getDataCenterName();
/**
* Returns the zone that hosts the node.
*/
public String getZoneName();
/**
* Returns true is the node is currently active, that is, it's reachable
* and can service requests.
*/
public boolean isActive();
/**
* Returns true if the node is currently a master.
*/
public boolean isMaster();
/**
* Returns the number of requests that were concurrently active for this
* node at this KVS client.
*/
public int getMaxActiveRequestCount();
/**
* Returns the total number of requests processed by the node.
*/
public long getRequestCount();
/**
* Returns the number of requests that were tried at this node but did not
* result in a successful response.
*/
public long getFailedRequestCount();
/**
* Returns the trailing average latency (in ms) over all requests made to
* this node.
*
* Note that since this is a trailing average it's not cleared when the
* statistics are cleared via the {@link KVStore#getStats(boolean)} method.
*/
public int getAvLatencyMs();
}
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