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Get reloaded metadata asynchronously after rule configuration altered (…
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mode/core/src/main/java/org/apache/shardingsphere/mode/metadata/MetaDataContextHolder.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,62 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
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| package org.apache.shardingsphere.mode.metadata; | ||
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| import lombok.AllArgsConstructor; | ||
| import lombok.Getter; | ||
| import lombok.extern.slf4j.Slf4j; | ||
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| import java.util.concurrent.CompletableFuture; | ||
| import java.util.concurrent.TimeUnit; | ||
| import java.util.concurrent.atomic.AtomicReference; | ||
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| /** | ||
| * Meta data context holder. | ||
| */ | ||
| @AllArgsConstructor | ||
| @Slf4j | ||
| public final class MetaDataContextHolder { | ||
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| @Getter | ||
| private final AtomicReference<MetaDataContexts> metaDataContexts; | ||
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| private final CompletableFuture<MetaDataContexts> future = new CompletableFuture<>(); | ||
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| /** | ||
| * Get meta data contexts. | ||
| * | ||
| * @return meta data contexts | ||
| */ | ||
| public MetaDataContexts getMetaDataContextsAsync() { | ||
| try { | ||
| return future.get(5, TimeUnit.SECONDS); | ||
| } catch (final InterruptedException | java.util.concurrent.ExecutionException | java.util.concurrent.TimeoutException ex) { | ||
| return metaDataContexts.get(); | ||
| } | ||
| } | ||
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| /** | ||
| * Update meta data contexts. | ||
| * | ||
| * @param reloadMetaDataContexts reload meta data contexts | ||
| */ | ||
| public void updateMetaDataContextsAsync(final MetaDataContexts reloadMetaDataContexts) { | ||
| metaDataContexts.set(reloadMetaDataContexts); | ||
| future.complete(reloadMetaDataContexts); | ||
| } | ||
| } |
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46 changes: 46 additions & 0 deletions
46
...core/src/test/java/org/apache/shardingsphere/mode/metadata/MetaDataContextHolderTest.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,46 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
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| package org.apache.shardingsphere.mode.metadata; | ||
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| import org.junit.jupiter.api.Test; | ||
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| import java.util.concurrent.atomic.AtomicReference; | ||
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| import static org.hamcrest.CoreMatchers.is; | ||
| import static org.hamcrest.MatcherAssert.assertThat; | ||
| import static org.junit.jupiter.api.Assertions.assertNotEquals; | ||
| import static org.mockito.Mockito.mock; | ||
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| class MetaDataContextHolderTest { | ||
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| private final MetaDataContexts metaDataContexts = mock(MetaDataContexts.class); | ||
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| private final MetaDataContextHolder metaDataContextHolder = new MetaDataContextHolder(new AtomicReference<>(metaDataContexts)); | ||
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| @Test | ||
| void assertGetMetaDataContextsAsync() { | ||
| assertThat(metaDataContextHolder.getMetaDataContextsAsync(), is(metaDataContexts)); | ||
| } | ||
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| @Test | ||
| void assertUpdateMetaDataContextsAsync() { | ||
| assertThat(metaDataContextHolder.getMetaDataContextsAsync(), is(metaDataContexts)); | ||
| metaDataContextHolder.updateMetaDataContextsAsync(mock(MetaDataContexts.class)); | ||
| assertNotEquals(metaDataContextHolder.getMetaDataContextsAsync(), metaDataContexts); | ||
| } | ||
| } |
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