com.phloc.commons.stats.IStatisticsHandlerKeyed Maven / Gradle / Ivy
/**
* Copyright (C) 2006-2015 phloc systems
* http://www.phloc.com
* office[at]phloc[dot]com
*
* Licensed 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 com.phloc.commons.stats;
import java.util.Set;
import javax.annotation.CheckForSigned;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
/**
* Base interface for keyed statistic handlers
*
* @author Philip Helger
*/
public interface IStatisticsHandlerKeyed extends IStatisticsHandler
{
/**
* @return A collection of all keys that have a value assigned. Never
* null.
*/
@Nonnull
Set getAllKeys ();
/**
* Get the invocation count for a single key.
*
* @param sKey
* The key to be queried. May be null.
* @return The invocation count for a single key or
* {@link com.phloc.commons.CGlobal#ILLEGAL_UINT} if no such key
* exists
*/
@CheckForSigned
int getInvocationCount (@Nullable String sKey);
}