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author | Yang Song <songy23@users.noreply.github.com> | 2018-08-10 15:43:52 -0700 |
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committer | GitHub <noreply@github.com> | 2018-08-10 15:43:52 -0700 |
commit | 81e8ded6d2f869980a7f80a27ead4bd2ccc45243 (patch) | |
tree | 0295f6b3c683bbafa506eeeb6a7937afc5258023 /api/src/main/java/io/opencensus/metrics/export/ExportComponent.java | |
parent | a804907c77858ff319ba059af968f6cfd8eb3925 (diff) | |
download | opencensus-java-81e8ded6d2f869980a7f80a27ead4bd2ccc45243.tar.gz |
Metrics: Move metrics to opencensus-api. (#1346)
* Metrics: Move to api.
* Update package-info to warn users on using metrics.
Diffstat (limited to 'api/src/main/java/io/opencensus/metrics/export/ExportComponent.java')
-rw-r--r-- | api/src/main/java/io/opencensus/metrics/export/ExportComponent.java | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/api/src/main/java/io/opencensus/metrics/export/ExportComponent.java b/api/src/main/java/io/opencensus/metrics/export/ExportComponent.java new file mode 100644 index 00000000..f1511543 --- /dev/null +++ b/api/src/main/java/io/opencensus/metrics/export/ExportComponent.java @@ -0,0 +1,60 @@ +/* + * 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.metrics.export; + +import io.opencensus.common.ExperimentalApi; + +/** + * Class that holds the implementation instance for {@link MetricProducerManager}. + * + * <p>Unless otherwise noted all methods (on component) results are cacheable. + * + * @since 0.16 + */ +@ExperimentalApi +public abstract class ExportComponent { + /** + * Returns the no-op implementation of the {@code ExportComponent}. + * + * @return the no-op implementation of the {@code ExportComponent}. + * @since 0.16 + */ + public static ExportComponent newNoopExportComponent() { + return new NoopExportComponent(); + } + + /** + * Returns the global {@link MetricProducerManager} which can be used to register handlers to + * export all the recorded metrics. + * + * @return the implementation of the {@code MetricExporter} or no-op if no implementation linked + * in the binary. + * @since 0.16 + */ + public abstract MetricProducerManager getMetricProducerManager(); + + private static final class NoopExportComponent extends ExportComponent { + + private static final MetricProducerManager METRIC_PRODUCER_MANAGER = + new MetricProducerManager(); + + @Override + public MetricProducerManager getMetricProducerManager() { + return METRIC_PRODUCER_MANAGER; + } + } +} |