tech.aroma.data.performance.Operations.java Source code

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Here is the source code for tech.aroma.data.performance.Operations.java

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/*
 * Copyright 2016 RedRoma, Inc.
 *
 * 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 tech.aroma.data.performance;

import com.google.common.base.Strings;
import org.apache.thrift.TException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import tech.sirwellington.alchemy.annotations.access.Internal;
import tech.sirwellington.alchemy.annotations.access.NonInstantiable;
import tech.sirwellington.alchemy.annotations.arguments.Required;

import static tech.sirwellington.alchemy.arguments.Arguments.checkThat;
import static tech.sirwellington.alchemy.arguments.assertions.Assertions.notNull;

/**
 *
 * @author SirWellington
 */
@Internal
@NonInstantiable
final class Operations {
    private final static Logger LOG = LoggerFactory.getLogger(Operations.class);

    /**
     * Measures the time it takes to run an operation, in ms.
     * 
     * @param operation The operation to call
     * 
     * @return The Time it took for the operation to complete, in ms.
     * @throws Exception 
     */
    public static long measureOperation(@Required Operation<?> operation) throws TException {
        checkThat(operation).is(notNull());

        long start = System.currentTimeMillis();

        operation.call();

        long end = System.currentTimeMillis();

        return end - start;
    }

    public static <T> T logLatency(@Required Operation<T> operation, String operationName) throws TException {
        checkThat(operation).is(notNull());

        operationName = Strings.nullToEmpty(operationName);

        long start = System.currentTimeMillis();

        try {
            return operation.call();
        } finally {
            long end = System.currentTimeMillis();
            LOG.debug("{} Operation took {} ms", operationName, end - start);
        }
    }
}