diff options
author | Bogdan Drutu <bdrutu@google.com> | 2018-08-10 14:45:23 -0700 |
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committer | GitHub <noreply@github.com> | 2018-08-10 14:45:23 -0700 |
commit | a804907c77858ff319ba059af968f6cfd8eb3925 (patch) | |
tree | ca5cb145056682cf950a9e8442d4b7f05242cddc /api/src/main | |
parent | 52f38e48e2ac6cb65e28dcd97b4f7e9650357bba (diff) | |
download | opencensus-java-a804907c77858ff319ba059af968f6cfd8eb3925.tar.gz |
Add support for recording Gauges. (#1344)
* Add support for Gauges in OpenCensus.
* Minor comment fix.
Diffstat (limited to 'api/src/main')
-rw-r--r-- | api/src/main/java/io/opencensus/common/ToDoubleFunction.java | 39 | ||||
-rw-r--r-- | api/src/main/java/io/opencensus/common/ToLongFunction.java | 38 |
2 files changed, 77 insertions, 0 deletions
diff --git a/api/src/main/java/io/opencensus/common/ToDoubleFunction.java b/api/src/main/java/io/opencensus/common/ToDoubleFunction.java new file mode 100644 index 00000000..479270f1 --- /dev/null +++ b/api/src/main/java/io/opencensus/common/ToDoubleFunction.java @@ -0,0 +1,39 @@ +/* + * Copyright 2018, OpenCensus 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 + * + * 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 io.opencensus.common; + +// TODO(bdrutu): Change @code to @link when metrics is moved in the API. + +/** + * Represents a function that produces a double-valued result. See {@code + * io.opencensus.metrics.MetricRegistry} for an example of its use. + * + * <p>Note: This class is based on the java.util.ToDoubleFunction class added in Java 1.8. We cannot + * use the Function from Java 1.8 because this library is Java 1.6 compatible. + * + * @since 0.16 + */ +public interface ToDoubleFunction<T> { + + /** + * Applies this function to the given argument. + * + * @param value the function argument. + * @return the function result. + */ + double applyAsDouble(T value); +} diff --git a/api/src/main/java/io/opencensus/common/ToLongFunction.java b/api/src/main/java/io/opencensus/common/ToLongFunction.java new file mode 100644 index 00000000..9a6e9b19 --- /dev/null +++ b/api/src/main/java/io/opencensus/common/ToLongFunction.java @@ -0,0 +1,38 @@ +/* + * Copyright 2018, OpenCensus 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 + * + * 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 io.opencensus.common; + +// TODO(bdrutu): Change @code to @link when metrics is moved in the API. + +/** + * Represents a function that produces a long-valued result. See {@code + * io.opencensus.metrics.MetricRegistry} for an example of its use. + * + * <p>Note: This class is based on the java.util.ToLongFunction class added in Java 1.8. We cannot + * use the Function from Java 1.8 because this library is Java 1.6 compatible. + * + * @since 0.16 + */ +public interface ToLongFunction<T> { + /** + * Applies this function to the given argument. + * + * @param value the function argument. + * @return the function result. + */ + long applyAsLong(T value); +} |