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feat: add implementation of ChannelPrimer to establish connection to …
…GFE and integrate into bigtable client (#115)
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54 changes: 54 additions & 0 deletions
54
...oud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/internal/RefreshChannel.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| /* | ||
| * Copyright 2019 Google LLC | ||
| * | ||
| * 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 com.google.cloud.bigtable.data.v2.internal; | ||
|
|
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| import com.google.api.core.BetaApi; | ||
| import com.google.api.core.InternalApi; | ||
| import com.google.api.gax.grpc.ChannelPrimer; | ||
| import io.grpc.ConnectivityState; | ||
| import io.grpc.ManagedChannel; | ||
| import java.util.concurrent.TimeUnit; | ||
|
|
||
| /** | ||
| * Establish a connection to the Cloud Bigtable service on managedChannel | ||
| * | ||
| * <p>This class is considered an internal implementation detail and not meant to be used by | ||
| * applications. | ||
| */ | ||
| @BetaApi("This API depends on gRPC experimental API") | ||
| @InternalApi | ||
| public final class RefreshChannel implements ChannelPrimer { | ||
|
|
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| /** | ||
| * primeChannel establishes a connection to Cloud Bigtable service. This typically take less than | ||
| * 1s. In case of service failure, an upper limit of 10s prevents primeChannel from looping | ||
| * forever. | ||
| */ | ||
| @Override | ||
| public void primeChannel(ManagedChannel managedChannel) { | ||
| for (int i = 0; i < 10; i++) { | ||
| ConnectivityState connectivityState = managedChannel.getState(true); | ||
| if (connectivityState == ConnectivityState.READY) { | ||
| break; | ||
| } | ||
| try { | ||
| TimeUnit.SECONDS.sleep(1); | ||
| } catch (InterruptedException e) { | ||
| break; | ||
| } | ||
| } | ||
| } | ||
| } |
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38
...bigtable/src/test/java/com/google/cloud/bigtable/data/v2/internal/RefreshChannelTest.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,38 @@ | ||
| /* | ||
| * Copyright 2019 Google LLC | ||
| * | ||
| * 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 com.google.cloud.bigtable.data.v2.internal; | ||
|
|
||
| import io.grpc.ConnectivityState; | ||
| import io.grpc.ManagedChannel; | ||
| import org.junit.Test; | ||
| import org.junit.runner.RunWith; | ||
| import org.junit.runners.JUnit4; | ||
| import org.mockito.Mockito; | ||
|
|
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| @RunWith(JUnit4.class) | ||
| public class RefreshChannelTest { | ||
| // RefreshChannel should establish connection to the server through managedChannel.getState(true) | ||
| @Test | ||
| public void testGetStateIsCalled() { | ||
| RefreshChannel refreshChannel = new RefreshChannel(); | ||
| ManagedChannel managedChannel = Mockito.mock(ManagedChannel.class); | ||
|
|
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| Mockito.doReturn(ConnectivityState.READY).when(managedChannel).getState(true); | ||
|
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| refreshChannel.primeChannel(managedChannel); | ||
| Mockito.verify(managedChannel, Mockito.atLeastOnce()).getState(true); | ||
| } | ||
| } |
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