diff options
Diffstat (limited to 'aai-failover')
| -rw-r--r-- | aai-failover/pom.xml | 36 | ||||
| -rw-r--r-- | aai-failover/src/main/java/org/onap/aai/failover/FailoverAspect.java | 93 | ||||
| -rw-r--r-- | aai-failover/src/main/java/org/onap/aai/failover/FailoverMonitor.java | 58 |
3 files changed, 187 insertions, 0 deletions
diff --git a/aai-failover/pom.xml b/aai-failover/pom.xml new file mode 100644 index 00000000..f03e3b8d --- /dev/null +++ b/aai-failover/pom.xml @@ -0,0 +1,36 @@ +<?xml version="1.0" encoding="UTF-8"?> +<project xmlns="http://maven.apache.org/POM/4.0.0" + xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" + xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> + <parent> + <groupId>org.onap.aai.aai-common</groupId> + <artifactId>aai-parent</artifactId> + <version>1.7.0-SNAPSHOT</version> + <relativePath>../aai-parent/pom.xml</relativePath> + </parent> + <modelVersion>4.0.0</modelVersion> + + <artifactId>aai-failover</artifactId> + + <dependencies> + <!-- Common logging framework --> + <dependency> + <groupId>org.onap.aai.logging-service</groupId> + <artifactId>common-logging</artifactId> + </dependency> + <dependency> + <groupId>org.springframework</groupId> + <artifactId>spring-context</artifactId> + </dependency> + <dependency> + <groupId>org.springframework</groupId> + <artifactId>spring-aspects</artifactId> + <version>${spring.version}</version> + </dependency> + <dependency> + <groupId>org.aspectj</groupId> + <artifactId>aspectjrt</artifactId> + <version>1.9.1</version> + </dependency> + </dependencies> +</project> diff --git a/aai-failover/src/main/java/org/onap/aai/failover/FailoverAspect.java b/aai-failover/src/main/java/org/onap/aai/failover/FailoverAspect.java new file mode 100644 index 00000000..ee21d167 --- /dev/null +++ b/aai-failover/src/main/java/org/onap/aai/failover/FailoverAspect.java @@ -0,0 +1,93 @@ +/** + * ============LICENSE_START======================================================= + * org.onap.aai + * ================================================================================ + * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * 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. + * ============LICENSE_END========================================================= + */ +package org.onap.aai.failover; + +import org.aspectj.lang.ProceedingJoinPoint; +import org.aspectj.lang.annotation.Around; +import org.aspectj.lang.annotation.Aspect; +import org.aspectj.lang.reflect.MethodSignature; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; +import org.springframework.stereotype.Component; + +import java.util.Date; +import java.util.concurrent.atomic.AtomicLong; + +@Aspect +@Component +public class FailoverAspect { + + private final Logger LOGGER = LoggerFactory.getLogger(FailoverAspect.class); + + private final FailoverMonitor failoverMonitor; + private final AtomicLong atomicLong; + + public FailoverAspect(FailoverMonitor failoverMonitor){ + this.failoverMonitor = failoverMonitor; + this.atomicLong = new AtomicLong(1l); + } + + /* + * By default, check for the existence of the following file: /opt/app/failover/failover.properties + * + * If the file exists, open the file as properties + * and find the following property: is_primary + * Check if the following value is set to true + * If it is set to true, then proceed with running the scheduled task + * and store the current value into an thread safe variable + * + * If the file doesn't exist, then proceed with the execution of scheduled task + * as if it is the primary site since there is nothing helping identify if its primary + * + * If the application is not in an kubernetes environment, in order to emulate the behavior + * search for the file in the classpath of application + * If the file can be found then it will behavior similar to above in kubernetes env + * + * Since some tasks such as ones in history is constantly getting data + * with little time in between each runs of the task to get latest data + * we don't want to log too much when the failover properties isn't being changed + * So it will check the last time this got executed and see if its more than two minutes have passed + * then if it did, then it will log current status + */ + @Around("@annotation(org.springframework.scheduling.annotation.Scheduled)") + public void preSchedule(ProceedingJoinPoint pointcut) throws Throwable { + + Object target = pointcut.getTarget(); + MethodSignature signature = (MethodSignature) pointcut.getSignature(); + String method = signature.getMethod().getName(); + + if(failoverMonitor.shouldRun()){ + atomicLong.set(1l); + pointcut.proceed(); + } else { + long currentTime = new Date().getTime(); + long lastMessageTime = atomicLong.get(); + + if((currentTime - lastMessageTime) > 120000){ + atomicLong.compareAndSet(lastMessageTime, new Date().getTime()); + LOGGER.debug("Not proceeding the task {}#{} due to is_primary set to false in failover.properties", + target.getClass(), + method + ); + } + } + } +} + diff --git a/aai-failover/src/main/java/org/onap/aai/failover/FailoverMonitor.java b/aai-failover/src/main/java/org/onap/aai/failover/FailoverMonitor.java new file mode 100644 index 00000000..cadddc24 --- /dev/null +++ b/aai-failover/src/main/java/org/onap/aai/failover/FailoverMonitor.java @@ -0,0 +1,58 @@ +/** + * ============LICENSE_START======================================================= + * org.onap.aai + * ================================================================================ + * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * 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. + * ============LICENSE_END========================================================= + */ +package org.onap.aai.failover; + +import org.springframework.beans.factory.annotation.Value; +import org.springframework.stereotype.Component; + +import java.io.IOException; +import java.io.InputStream; +import java.nio.file.Files; +import java.nio.file.Path; +import java.nio.file.Paths; +import java.util.Properties; + +@Component +public class FailoverMonitor { + + private static final String IS_PRIMARY = "is_primary"; + private static final String TRUE = "true"; + private static final String DEFAULT_FOR_PRIMARY = TRUE; + + @Value("${failover.location:/opt/app/failover/failover.properties}") + private String failoverPropertiesPath; + + public boolean shouldRun() throws IOException { + + Path failoverPath = Paths.get(failoverPropertiesPath); + + if(Files.exists(failoverPath)){ + Properties properties = new Properties(); + try (InputStream is = Files.newInputStream(failoverPath)){ + properties.load(is); + // If the property is_primary is missing then it should proceed + return TRUE.equals(properties.getProperty(IS_PRIMARY, DEFAULT_FOR_PRIMARY)); + } + } else { + // If the file doesn't exist, then scheduled task should execute + return true; + } + } +} |