| /* |
| * 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. |
| */ |
| package org.apache.camel.model; |
| |
| import java.util.concurrent.ForkJoinPool; |
| |
| import javax.xml.bind.annotation.XmlAccessType; |
| import javax.xml.bind.annotation.XmlAccessorType; |
| import javax.xml.bind.annotation.XmlRootElement; |
| import javax.xml.bind.annotation.XmlTransient; |
| |
| import org.apache.camel.spi.Metadata; |
| |
| /** |
| * Resilience4j Circuit Breaker EIP configuration |
| */ |
| @Metadata(label = "eip,routing,circuitbreaker") |
| @XmlRootElement(name = "resilience4jConfiguration") |
| @XmlAccessorType(XmlAccessType.FIELD) |
| public class Resilience4jConfigurationDefinition extends Resilience4jConfigurationCommon { |
| |
| @XmlTransient |
| private CircuitBreakerDefinition parent; |
| |
| public Resilience4jConfigurationDefinition() { |
| } |
| |
| public Resilience4jConfigurationDefinition(CircuitBreakerDefinition parent) { |
| this.parent = parent; |
| } |
| |
| // Fluent API |
| // ------------------------------------------------------------------------- |
| |
| /** |
| * Refers to an existing io.github.resilience4j.circuitbreaker.CircuitBreaker instance |
| * to lookup and use from the registry. When using this, then any other circuit breaker options |
| * are not in use. |
| */ |
| public Resilience4jConfigurationDefinition circuitBreakerRef(String circuitBreakerRef) { |
| setCircuitBreakerRef(circuitBreakerRef); |
| return this; |
| } |
| |
| |
| /** |
| * Refers to an existing io.github.resilience4j.circuitbreaker.CircuitBreakerConfig instance |
| * to lookup and use from the registry. |
| */ |
| public Resilience4jConfigurationDefinition configRef(String ref) { |
| setConfigRef(ref); |
| return this; |
| } |
| |
| /** |
| * Configures the failure rate threshold in percentage. |
| * If the failure rate is equal or greater than the threshold the CircuitBreaker transitions to open and starts short-circuiting calls. |
| * <p> |
| * The threshold must be greater than 0 and not greater than 100. Default value is 50 percentage. |
| */ |
| public Resilience4jConfigurationDefinition failureRateThreshold(Float failureRateThreshold) { |
| setFailureRateThreshold(failureRateThreshold); |
| return this; |
| } |
| |
| /** |
| * Configures the number of permitted calls when the CircuitBreaker is half open. |
| * <p> |
| * The size must be greater than 0. Default size is 10. |
| */ |
| public Resilience4jConfigurationDefinition permittedNumberOfCallsInHalfOpenState(Integer permittedNumberOfCallsInHalfOpenState) { |
| setPermittedNumberOfCallsInHalfOpenState(permittedNumberOfCallsInHalfOpenState); |
| return this; |
| } |
| |
| /** |
| * Configures the size of the sliding window which is used to record the outcome of calls when the CircuitBreaker is closed. |
| * {@code slidingWindowSize} configures the size of the sliding window. Sliding window can either be count-based or time-based. |
| * |
| * If {@code slidingWindowType} is COUNT_BASED, the last {@code slidingWindowSize} calls are recorded and aggregated. |
| * If {@code slidingWindowType} is TIME_BASED, the calls of the last {@code slidingWindowSize} seconds are recorded and aggregated. |
| * <p> |
| * The {@code slidingWindowSize} must be greater than 0. |
| * The {@code minimumNumberOfCalls} must be greater than 0. |
| * If the slidingWindowType is COUNT_BASED, the {@code minimumNumberOfCalls} cannot be greater than {@code slidingWindowSize}. |
| * If the slidingWindowType is TIME_BASED, you can pick whatever you want. |
| * |
| * Default slidingWindowSize is 100. |
| */ |
| public Resilience4jConfigurationDefinition slidingWindowSize(Integer slidingWindowSize) { |
| setSlidingWindowSize(slidingWindowSize); |
| return this; |
| } |
| |
| /** |
| * Configures the type of the sliding window which is used to record the outcome of calls when the CircuitBreaker is closed. |
| * Sliding window can either be count-based or time-based. |
| * |
| * If {@code slidingWindowType} is COUNT_BASED, the last {@code slidingWindowSize} calls are recorded and aggregated. |
| * If {@code slidingWindowType} is TIME_BASED, the calls of the last {@code slidingWindowSize} seconds are recorded and aggregated. |
| * |
| * Default slidingWindowType is COUNT_BASED. |
| */ |
| public Resilience4jConfigurationDefinition slidingWindowType(String slidingWindowType) { |
| setSlidingWindowType(slidingWindowType); |
| return this; |
| } |
| |
| /** |
| * Configures configures the minimum number of calls which are required (per sliding window period) before the CircuitBreaker can calculate the error rate. |
| * For example, if {@code minimumNumberOfCalls} is 10, then at least 10 calls must be recorded, before the failure rate can be calculated. |
| * If only 9 calls have been recorded the CircuitBreaker will not transition to open even if all 9 calls have failed. |
| * |
| * Default minimumNumberOfCalls is 100 |
| */ |
| public Resilience4jConfigurationDefinition minimumNumberOfCalls(Integer minimumNumberOfCalls) { |
| setMinimumNumberOfCalls(minimumNumberOfCalls); |
| return this; |
| } |
| |
| /** |
| * Enables writable stack traces. When set to false, Exception.getStackTrace returns a zero length array. |
| * This may be used to reduce log spam when the circuit breaker is open as the cause of the exceptions is already known (the circuit breaker is short-circuiting calls). |
| */ |
| public Resilience4jConfigurationDefinition writableStackTraceEnabled(Boolean writableStackTraceEnabled) { |
| setWritableStackTraceEnabled(writableStackTraceEnabled); |
| return this; |
| } |
| |
| /** |
| * Configures the wait duration (in seconds) which specifies how long the CircuitBreaker should stay open, before it switches to half open. |
| * Default value is 60 seconds. |
| */ |
| public Resilience4jConfigurationDefinition waitDurationInOpenState(Integer waitDurationInOpenState) { |
| setWaitDurationInOpenState(waitDurationInOpenState); |
| return this; |
| } |
| |
| /** |
| * Enables automatic transition from OPEN to HALF_OPEN state once the waitDurationInOpenState has passed. |
| */ |
| public Resilience4jConfigurationDefinition automaticTransitionFromOpenToHalfOpenEnabled(Boolean automaticTransitionFromOpenToHalfOpenEnabled) { |
| setAutomaticTransitionFromOpenToHalfOpenEnabled(automaticTransitionFromOpenToHalfOpenEnabled); |
| return this; |
| } |
| |
| /** |
| * Configures a threshold in percentage. The CircuitBreaker considers a call as slow when the call duration is greater than slowCallDurationThreshold(Duration. |
| * When the percentage of slow calls is equal or greater the threshold, the CircuitBreaker transitions to open and starts short-circuiting calls. |
| * <p> |
| * The threshold must be greater than 0 and not greater than 100. |
| * Default value is 100 percentage which means that all recorded calls must be slower than slowCallDurationThreshold. |
| */ |
| public Resilience4jConfigurationDefinition slowCallRateThreshold(Float slowCallRateThreshold) { |
| setSlowCallRateThreshold(slowCallRateThreshold); |
| return this; |
| } |
| |
| /** |
| * Configures the duration threshold (seconds) above which calls are considered as slow and increase the slow calls percentage. |
| * Default value is 60 seconds. |
| */ |
| public Resilience4jConfigurationDefinition slowCallDurationThreshold(Integer slowCallDurationThreshold) { |
| setSlowCallDurationThreshold(slowCallDurationThreshold); |
| return this; |
| } |
| |
| /** |
| * Whether bulkhead is enabled or not on the circuit breaker. |
| * Default is false. |
| */ |
| public Resilience4jConfigurationDefinition bulkheadEnabled(Boolean bulkheadEnabled) { |
| setBulkheadEnabled(bulkheadEnabled); |
| return this; |
| } |
| |
| /** |
| * Configures the max amount of concurrent calls the bulkhead will support. |
| */ |
| public Resilience4jConfigurationDefinition bulkheadMaxConcurrentCalls(Integer bulkheadMaxConcurrentCalls) { |
| setBulkheadMaxWaitDuration(bulkheadMaxConcurrentCalls); |
| return this; |
| } |
| |
| /** |
| * Configures a maximum amount of time which the calling thread will wait to enter the bulkhead. If bulkhead has space available, entry |
| * is guaranteed and immediate. If bulkhead is full, calling threads will contest for space, if it becomes available. maxWaitDuration can be set to 0. |
| * <p> |
| * Note: for threads running on an event-loop or equivalent (rx computation pool, etc), setting maxWaitDuration to 0 is highly recommended. Blocking |
| * an event-loop thread will most likely have a negative effect on application throughput. |
| */ |
| public Resilience4jConfigurationDefinition bulkheadMaxWaitDuration(Integer bulkheadMaxWaitDuration) { |
| setBulkheadMaxWaitDuration(bulkheadMaxWaitDuration); |
| return this; |
| } |
| |
| /** |
| * Whether timeout is enabled or not on the circuit breaker. |
| * Default is false. |
| */ |
| public Resilience4jConfigurationDefinition timeoutEnabled(Boolean timeoutEnabled) { |
| setTimeoutEnabled(timeoutEnabled); |
| return this; |
| } |
| |
| /** |
| * References to a custom thread pool to use when timeout is enabled (uses {@link ForkJoinPool#commonPool()} by default) |
| */ |
| public Resilience4jConfigurationDefinition timeoutExecutorServiceRef(String executorServiceRef) { |
| setTimeoutExecutorServiceRef(executorServiceRef); |
| return this; |
| } |
| |
| /** |
| * Configures the thread execution timeout (millis). |
| * Default value is 1000 millis (1 second). |
| */ |
| public Resilience4jConfigurationDefinition timeoutDuration(Integer timeoutDuration) { |
| setTimeoutDuration(timeoutDuration); |
| return this; |
| } |
| |
| /** |
| * Configures whether cancel is called on the running future. |
| * Defaults to true. |
| */ |
| public Resilience4jConfigurationDefinition timeoutCancelRunningFuture(Boolean timeoutCancelRunningFuture) { |
| setTimeoutCancelRunningFuture(timeoutCancelRunningFuture); |
| return this; |
| } |
| |
| /** |
| * End of configuration. |
| */ |
| public CircuitBreakerDefinition end() { |
| return parent; |
| } |
| |
| } |