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[FLINK-1502] [core] Add basic metric system
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69 changes: 69 additions & 0 deletions
69
flink-core/src/main/java/org/apache/flink/metrics/Counter.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,69 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF 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.apache.flink.metrics; | ||
|
|
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| import org.apache.flink.annotation.PublicEvolving; | ||
|
|
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| /** | ||
| * A Counter is a {@link org.apache.flink.metrics.Metric} that measures a count. | ||
| */ | ||
| @PublicEvolving | ||
| public final class Counter implements Metric { | ||
| private long count = 0; | ||
|
|
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| /** | ||
| * Increment the current count by 1. | ||
| */ | ||
| public void inc() { | ||
| count++; | ||
| } | ||
|
|
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| /** | ||
| * Increment the current count by the given value. | ||
| * | ||
| * @param n value to increment the current count by | ||
| */ | ||
| public void inc(long n) { | ||
| count += n; | ||
| } | ||
|
|
||
| /** | ||
| * Decrement the current count by 1. | ||
| */ | ||
| public void dec() { | ||
| count--; | ||
| } | ||
|
|
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| /** | ||
| * Decrement the current count by the given value. | ||
| * | ||
| * @param n value to decrement the current count by | ||
| */ | ||
| public void dec(long n) { | ||
| count -= n; | ||
| } | ||
|
|
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| /** | ||
| * Returns the current count. | ||
| * | ||
| * @return current count | ||
| */ | ||
| public long getCount() { | ||
| return count; | ||
| } | ||
| } |
33 changes: 33 additions & 0 deletions
33
flink-core/src/main/java/org/apache/flink/metrics/Gauge.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,33 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF 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.apache.flink.metrics; | ||
|
|
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| import org.apache.flink.annotation.PublicEvolving; | ||
|
|
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| /** | ||
| * A Gauge is a {@link org.apache.flink.metrics.Metric} that calculates a specific value at a point in time. | ||
| */ | ||
| @PublicEvolving | ||
| public abstract class Gauge<T> implements Metric { | ||
| /** | ||
| * Calculates and returns the measured value. | ||
| * | ||
| * @return calculated value | ||
| */ | ||
| public abstract T getValue(); | ||
| } |
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