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Proof of concept implementation for KafkaRoller 2.0
Signed-off-by: Gantigmaa Selenge <[email protected]>
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16 changes: 16 additions & 0 deletions
16
...ator/src/main/java/io/strimzi/operator/cluster/operator/resource/rolling/AgentClient.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,16 @@ | ||
| /* | ||
| * Copyright Strimzi authors. | ||
| * License: Apache License 2.0 (see the file LICENSE or http://apache.org/licenses/LICENSE-2.0.html). | ||
| */ | ||
| package io.strimzi.operator.cluster.operator.resource.rolling; | ||
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| import io.strimzi.operator.cluster.model.NodeRef; | ||
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| /** | ||
| * An abstraction over a KafkaAgent client. | ||
| */ | ||
| interface AgentClient { | ||
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| /** @return The broker state, according to the Kafka Agent */ | ||
| BrokerState getBrokerState(NodeRef nodeRef); | ||
| } |
26 changes: 26 additions & 0 deletions
26
.../src/main/java/io/strimzi/operator/cluster/operator/resource/rolling/AgentClientImpl.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,26 @@ | ||
| /* | ||
| * Copyright Strimzi authors. | ||
| * License: Apache License 2.0 (see the file LICENSE or http://apache.org/licenses/LICENSE-2.0.html). | ||
| */ | ||
| package io.strimzi.operator.cluster.operator.resource.rolling; | ||
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| import io.strimzi.operator.cluster.model.NodeRef; | ||
| import io.strimzi.operator.cluster.operator.resource.KafkaAgentClient; | ||
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| class AgentClientImpl implements AgentClient { | ||
| private final KafkaAgentClient kafkaAgentClient; | ||
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| AgentClientImpl(KafkaAgentClient kafkaAgentClient) { | ||
| this.kafkaAgentClient = kafkaAgentClient; | ||
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| } | ||
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| @Override | ||
| public BrokerState getBrokerState(NodeRef nodeRef) { | ||
| var result = kafkaAgentClient.getBrokerState(nodeRef.podName()); | ||
| BrokerState brokerState = BrokerState.fromValue((byte) result.code()); | ||
| brokerState.setRemainingSegmentsToRecover(result.remainingSegmentsToRecover()); | ||
| brokerState.setRemainingLogsToRecover(result.remainingLogsToRecover()); | ||
| return brokerState; | ||
| } | ||
| } |
115 changes: 115 additions & 0 deletions
115
...r-operator/src/main/java/io/strimzi/operator/cluster/operator/resource/rolling/Alarm.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,115 @@ | ||
| /* | ||
| * Copyright Strimzi authors. | ||
| * License: Apache License 2.0 (see the file LICENSE or http://apache.org/licenses/LICENSE-2.0.html). | ||
| */ | ||
| package io.strimzi.operator.cluster.operator.resource.rolling; | ||
|
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| import io.strimzi.operator.common.UncheckedInterruptedException; | ||
|
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| import java.util.concurrent.TimeoutException; | ||
| import java.util.function.BooleanSupplier; | ||
| import java.util.function.Supplier; | ||
|
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| /** | ||
| * Timing utility for polling loops which allows to set an alarm (in terms of a duration from "now") and | ||
| * subsequently sleep the executing thread. If the alarm duration is exceeded the call to sleep will throw a | ||
| * {@link TimeoutException}. This can be used to simplify writing polling logic like the following | ||
| * <pre>{@code | ||
| * long timeoutMs = 60_000 | ||
| * long pollIntervalMs = 1_000; | ||
| * Alarm alarm = Alarm.start(time, timeoutMs); | ||
| * while (true) { | ||
| * // do some processing | ||
| * if (processingSuccess) { | ||
| * timeoutMs = alarm.remainingMs(); | ||
| * // we might want to use the remaining timeout when | ||
| * // a single timeout is used for a sequence of polling tasks | ||
| * break; | ||
| * } | ||
| * alarm.sleep(pollIntervalMs); | ||
| * } | ||
| * }</pre> | ||
| * This logic is encapsulated in the {@link #poll(long, BooleanSupplier)} method. | ||
| */ | ||
| public class Alarm { | ||
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| final Time time; | ||
| final long deadline; | ||
| private final Supplier<String> timeoutMessageSupplier; | ||
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| private Alarm(Time time, long deadline, Supplier<String> timeoutMessageSupplier) { | ||
| this.time = time; | ||
| this.deadline = deadline; | ||
| this.timeoutMessageSupplier = timeoutMessageSupplier; | ||
| } | ||
|
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| /** | ||
| * Creates an Alerm | ||
| * @param time The source of time | ||
| * @param timeoutMs The timeout for this alarm. | ||
| * @param timeoutMessageSupplier The exception message | ||
| * @return The alarm | ||
| */ | ||
| public static Alarm timer(Time time, long timeoutMs, Supplier<String> timeoutMessageSupplier) { | ||
| if (timeoutMs < 0) { | ||
| throw new IllegalArgumentException(); | ||
| } | ||
| long deadline = time.nanoTime() + 1_000_000 * timeoutMs; | ||
| return new Alarm(time, deadline, timeoutMessageSupplier); | ||
| } | ||
|
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| /** | ||
| * @return The remaining number of milliseconds until the deadline passed | ||
| */ | ||
| public long remainingMs() { | ||
| return Math.max(deadline - time.nanoTime(), 0) / 1_000_000L; | ||
| } | ||
|
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| /** | ||
| * Sleep the current thread for at most at least {@code ms} milliseconds, according to | ||
| * (and subject to the precision and accuracy of) the configured {@link Time} instance. | ||
| * The actual sleep time will be less than {@code ms} if using {@code ms} would exceed this | ||
| * alarm's deadline. | ||
| * The thread does not lose ownership of any monitors. | ||
| * @param ms The number of milliseconds to sleep for. | ||
| * @throws TimeoutException If the Alarm's deadline has passed | ||
| * @throws InterruptedException If the current thread is interrupted | ||
| */ | ||
| public void sleep(long ms) throws TimeoutException, InterruptedException { | ||
| if (ms < 0) { | ||
| throw new IllegalArgumentException(); | ||
| } | ||
| long sleepNs = Math.min(1_000_000L * ms, deadline - time.nanoTime()); | ||
| if (sleepNs <= 0) { | ||
| throw new TimeoutException(timeoutMessageSupplier.get()); | ||
| } | ||
| time.sleep(sleepNs / 1_000_000L, (int) (sleepNs % 1_000_000L)); | ||
| } | ||
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| /** | ||
| * Test {@code done} at least once, returning when it returns true, and otherwise sleeping for at most approximately | ||
| * {@code pollIntervalMs} before repeating, throwing {@link TimeoutException} should this | ||
| * alarm expire before {@code done} returns true. | ||
| * | ||
| * @param pollIntervalMs The polling interval | ||
| * @param done A predicate function to detecting when the polling loop is complete. | ||
| * @return The remaining time left for this alarm, in ms. | ||
| * @throws UncheckedInterruptedException The thread was interrupted | ||
| * @throws TimeoutException The {@link #remainingMs()} has reached zero. | ||
| */ | ||
| public long poll(long pollIntervalMs, BooleanSupplier done) throws TimeoutException { | ||
| if (pollIntervalMs <= 0) { | ||
| throw new IllegalArgumentException(); | ||
| } | ||
| try { | ||
| while (true) { | ||
| if (done.getAsBoolean()) { | ||
| return this.remainingMs(); | ||
| } | ||
| this.sleep(pollIntervalMs); | ||
| } | ||
| } catch (InterruptedException e) { | ||
| throw new UncheckedInterruptedException(e); | ||
| } | ||
| } | ||
| } |
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