hazelcast

Hazelcast ClassNotFoundException for replicated maps

由 社会主义新天地 提交于 2020-01-17 11:15:09
问题 I have an issue with hazelcast v 3.6.2. Here is and replicatedmap config in hazelcast.xml for <replicatedmap name="default"> <in-memory-format>BINARY</in-memory-format> </replicatedmap> Here is a slice of code which rises an classnotfound exception: ReplicatedMap<Object, Object> r1 = getHazelCastInstance().getReplicatedMap("DDD"); TokenDef tf = new TokenDef(); tf.setLanguage("en"); tf.setTokenId("RRRR"); tf.setSiebelPassword("RRR"); r1.put("eeee",tf); r1.remove("eeee"); //!!! CLASS NOT FOUND

Controlled partitioning and MapStore

由 可紊 提交于 2020-01-16 16:53:46
问题 Lets say, I have several Hazelcast members (servers) spread across world (e.g. Germany, Russia and etc). It was required to store/split data in database by region and all data should be accessible from any server via IMap backed by MapStore . I recently read this article which fulfills my requirement, but I am not sure about how will MapStore behave. Crucial moment is that, if member1 (e.g. Russia) requests data from IMap with key owned by member2 (e.g. Germany), on which side MapStore.load()

Controlled partitioning and MapStore

由 醉酒当歌 提交于 2020-01-16 16:52:08
问题 Lets say, I have several Hazelcast members (servers) spread across world (e.g. Germany, Russia and etc). It was required to store/split data in database by region and all data should be accessible from any server via IMap backed by MapStore . I recently read this article which fulfills my requirement, but I am not sure about how will MapStore behave. Crucial moment is that, if member1 (e.g. Russia) requests data from IMap with key owned by member2 (e.g. Germany), on which side MapStore.load()

Hazelcast cluster not available on Eureka

由 三世轮回 提交于 2020-01-16 09:08:11
问题 I had a problem configuring simple Hazelcast cluster for existing Eureka client. My application is simple Java SpringBoot application with Eureka discovery enabled, it is properly available for Eureka, however Hazelcast cluster is not. This is my configuration: hazelcast.xml <hazelcast xsi:schemaLocation="http://www.hazelcast.com/schema/config http://www.hazelcast.com/schema/config/hazelcast-config-3.9.xsd" xmlns="http://www.hazelcast.com/schema/config" xmlns:xsi="http://www.w3.org/2001

Hazelcast server as a linux service

由 眉间皱痕 提交于 2020-01-13 08:44:51
问题 How to run hazelcast server as a linux service in production environments ? java -server -cp hazelcast.jar com.hazelcast.examples.StartServer StartServer runs the server with outputs to std terminal, what's the easiest way to run it as a linux service and write logs to a file & how do I specify min and max memory allocation for Hazelcast. I have to set it up as a service in an EC2 instance and bundle it. When EC2 autoscaling starts an instance, hazelcast server will start and join the cluster

Hazelcast access using CLI

由 流过昼夜 提交于 2020-01-12 07:34:07
问题 Suppose I have instance of Hazelcast running somewhere on remote machine and it executed in official Docker image. So I wolud like to see some data that Hazelcast stores just like in the first video here. So I'm wondering is there any way to connect to existing Hazelcast instance from any CLI utility to get the data but without Management Center ? 回答1: Andrii, You can take advantage of Hazelcast demo application. You can find here: com.hazelcast.console.ConsoleApp member console, part of

How to make Hazelcast nodes installed in docker on different aws instances interact with each other?

由 送分小仙女□ 提交于 2020-01-11 03:23:26
问题 I have three aws machines on which I have setup three docker containers having hazelcast-3.5.4 installed on them(ubuntu).With aws configuration set as what I do normally with Hazelcast(without docker).The nodes are not discovering each other. How to make them interact or discover each other? Hazelcast.xml file looks like this: <join> <multicast enabled="false"> <multicast-group>224.2.2.3</multicast-group> <multicast-port>54327</multicast-port> </multicast> <tcp-ip enabled="false"> <interface

使用Vertx构建微服务

由 孤人 提交于 2020-01-08 08:17:37
Vertx Vert.x is a tool-kit for building reactive applications on the JVM.（Vertx是运行在JVM上用来构建reactive application的工具集） Vertx Design 响应式的(Responsive)：一个响应式系统需要在合理的时间内处理请求。 弹性的(Resilient)：一个响应式系统必须在遇到异常（崩溃，超时， 500 错误等等）的时候保持响应的能力，所以它必须要为异常处理 而设计。 可伸缩的(Elastic)：一个响应式系统必须在不同的负载情况下都要保持响应能力，所以它必须能伸能缩，并且可以利用最少的资源来处理负载。 消息驱动(Message driven)：一个响应式系统的各个组件之间通过 异步消息传递 来进行交互。 支持多种语言：只要能运行在JVM上的语言，基本都支持。 简单的并发模型：就像写单线程代码一样简单，多线程并发由Vertx控制。 支持Event Bus：在同一个vertx集群，各个verticle 实例间可以通过event bus通信。同时也支持跨进程的TCP Event Bus ( tcp-eventbus-bridge ) Vertx与Netty的关系：Vertx使用Netty处理所有的IO。 Vertx 术语 Verticle Vertx部署和运行的代码

Mapstore not loading data from data base Hazelcast

由 旧时模样 提交于 2020-01-06 07:44:59
问题 I am using Hazelcast and mysql. I created a mapstore for my table in mysql. What i am trying to do is to populate data using map.loadAll from data base. My Map store implementation is this public class CityMapStore implements MapStore<Long, City> { private final Connection con; public CityMapStore() { try { con = DriverManager.getConnection("jdbc:mysql://localhost:3306/hazel", "root", "root123"); con.createStatement().executeUpdate( "create table if not exists City (id bigint, name varchar(45

hazelcast - read-backup-data vs near cache

由 六月ゝ 毕业季﹏ 提交于 2020-01-06 06:40:11
问题 In IMap configuration there is an attribute read-backup-data that can be set as true which enables a member to read the value from the backup copy, if available, in case the owner of the key is some other member. http://docs.hazelcast.org/docs/latest-development/manual/html/Distributed_Data_Structures/Map/Backing_Up_Maps.html#page_Enabling+Backup+Reads Then there is nearcache which will start caching results for a few datastructures locally. http://docs.hazelcast.org/docs/latest-development
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