io.micrometer.core.instrument.internal.OnlyOnceLoggingDenyMeterFilter Maven / Gradle / Ivy

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Application monitoring instrumentation facade

There is a newer version: 1.13.0

/*
 * Copyright 2012-2019 the original author or authors.
 *
 * 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
 *
 *      https://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 io.micrometer.core.instrument.internal;

import io.micrometer.core.instrument.Meter.Id;
import io.micrometer.core.instrument.config.MeterFilter;
import io.micrometer.core.instrument.config.MeterFilterReply;
import io.micrometer.core.util.internal.logging.InternalLogger;
import io.micrometer.core.util.internal.logging.InternalLoggerFactory;

import java.util.concurrent.atomic.AtomicBoolean;
import java.util.function.Supplier;

/**
 * {@link MeterFilter} to log only once a warning message and deny a {@link Id Meter.Id}.
 *
 * @author Jon Schneider
 * @author Dmytro Nosan
 * @since 1.5.0
 */
public final class OnlyOnceLoggingDenyMeterFilter implements MeterFilter {

    private static final InternalLogger logger = InternalLoggerFactory.getInstance(OnlyOnceLoggingDenyMeterFilter.class);

    private final AtomicBoolean alreadyWarned = new AtomicBoolean();

    private final Supplier message;

    public OnlyOnceLoggingDenyMeterFilter(Supplier message) {
        this.message = message;
    }

    @Override
    public MeterFilterReply accept(Id id) {
        if (logger.isWarnEnabled() && this.alreadyWarned.compareAndSet(false, true)) {
            logger.warn(this.message.get());
        }
        return MeterFilterReply.DENY;
    }

}