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关于Ignite的介绍,这边推荐三个链接进行学习了解。 https://ignite.apache.org/,首选还是官网,不过是英文版,如果阅读比较吃力可以选择下方两个链接。 Ht
关于Ignite的介绍,这边推荐三个链接进行学习了解。
https://ignite.apache.org/,首选还是官网,不过是英文版,如果阅读比较吃力可以选择下方两个链接。
Https://www.oschina.net/p/apache-ignite?hmsr=aladdin1e1,开源中国上对Ignite的介绍,包含特性、架构等内容,比较详细。
https://www.infoq.cn/article/apache-ignite-explorer,这个链接中将Ignite与Redis、Hazelcast等同类型产品做了比较。
接下来我们开始实践,首先需要在本地搭建一套Ignite服务,从官网上可以进行下载,https://ignite.apache.org/docs/latest/installation/installing-using-zip:
这里需要注意的是,我们要下载的是安装包,别下载了源码。下载完毕后解压,去到apache-ignite-2.8.1\bin目录双击ignite.bat即可启动服务:
打印上图中框出内容即为启动成功,接下来我们创建一个Spring Boot项目用于整合Ignite的相关验证,目录结构如下:
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.22.RELEASE</version>
<relativePath/>
</parent>
<properties>
<h2.version>1.4.197</h2.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-WEB</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
Spring Boot的版本推荐为1.5.X这类较为稳定的版本,从2.0.0开始的版本和Ignite会发生冲突,编译时抛出如下错误:
Error:(8, 8) java: 名称冲突: org.apache.ignite.springdata.repository.IgniteRepository中的deleteAll(java.lang.Iterable<ID>)和org.springframework.data.repository.CrudRepository中的deleteAll(java.lang.Iterable<? extends T>)具有相同疑符, 但两者均不覆盖对方
这里还需要注意一点,如果不指定h2的版本为1.4.197,启动应用时会抛出如下异常:
org.apache.ignite.internal.processors.query.IgnitesqlException: Failed to initialize system DB connection: jdbc:h2:mem:b9189e84-4966-4b03-8500-429a958cee4f;LOCK_MODE=3;MULTI_THREADED=1;DB_CLOSE_ON_EXIT=FALSE;DEFAULT_LOCK_TIMEOUT=10000;FUNCTIONS_IN_SCHEMA=true;OPTIMIZE_REUSE_RESULTS=0;QUERY_CACHE_SIZE=0;MAX_OPERATION_MEMORY=0;BATCH_JOINS=1;ROW_FACTORY="org.apache.ignite.internal.processors.query.h2.opt.H2PlainRowFactory";DEFAULT_TABLE_ENGINE=org.apache.ignite.internal.processors.query.h2.opt.GridH2DefaultTableEngine
at org.apache.ignite.internal.processors.query.h2.ConnectionManager.connectionNoCache(ConnectionManager.java:213) ~[ignite-indexing-2.8.1.jar:2.8.1]
at org.apache.ignite.internal.processors.query.h2.ConnectionManager.<init>(ConnectionManager.java:152) ~[ignite-indexing-2.8.1.jar:2.8.1]
at org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing.start(IgniteH2Indexing.java:2114) ~[ignite-indexing-2.8.1.jar:2.8.1]
at org.apache.ignite.internal.processors.query.GridQueryProcessor.start(GridQueryProcessor.java:256) ~[ignite-core-2.8.1.jar:2.8.1]
at org.apache.ignite.internal.IgniteKernal.startProcessor(IgniteKernal.java:1978) ~[ignite-core-2.8.1.jar:2.8.1]
at org.apache.ignite.internal.IgniteKernal.start(IgniteKernal.java:1212) ~[ignite-core-2.8.1.jar:2.8.1]
子模块spring-boot-test-ignite中需要添加Ignite的依赖,版本需要与本地搭建的Ignite服务保持一致:
<dependency>
<groupId>org.apache.ignite</groupId>
<artifactId>ignite-spring-data</artifactId>
<version>2.8.1</version>
</dependency>
接下来贴出Ignite的配置类IgniteConfig,通过动态IP发现绑定到本地的Ignite服务,同时创建实例与缓存供本地访问:
@Configuration
class IgniteConfig {
@Bean
public Ignite igniteInstance() {
tcpDiscoverySpi spi = new TcpDiscoverySpi();
TcpDiscoveryVmIpFinder ipFinder = new TcpDiscoveryVmIpFinder();
ipFinder.setAddresses(Arrays.asList("127.0.0.1:47500"));
spi.setIpFinder(ipFinder);
IgniteConfiguration igniteConfig = new IgniteConfiguration();
igniteConfig.setIgniteInstanceName("TestInstance");
igniteConfig.setDiscoverySpi(spi);
igniteConfig.setClientMode(true);
CacheConfiguration cacheConfig = new CacheConfiguration("TestCache");
cacheConfig.setIndexedTypes(Long.class, TestObject.class);
igniteConfig.setCacheConfiguration(cacheConfig);
return Ignition.start(igniteConfig);
}
}
用于数据交互的测试类TestObject,注解@QuerySqlField的作用时告诉Ignite后续可以通过id字段发起查询,如果没有此注解也不影响数据的插入,但是查询时会抛出Column not found的异常:
public class TestObject {
@QuerySqlField(index = true)
long id;
String name;
public TestObject(long id, String name) {
this.id = id;
this.name = name;
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
通过实现IgniteRepository来创建查询方式:
@RepositoryConfig(cacheName = "TestCache")
public interface TestRepository extends IgniteRepository<TestObject, Long> {
TestObject findById(long id);
}
再下来是用于测试的接口及其对应实现:
public interface TestService {
TestObject save(TestObject testObject);
TestObject findTestObjectById(long id);
}
@Service
public class TestServiceImpl implements TestService {
@Autowired TestRepository testRepository;
public TestObject save(TestObject testObject) {
return testRepository.save(testObject.getId(), testObject);
}
public TestObject findTestObjectById(long id) {
return testRepository.findById(id);
}
}
倒数第二步是编写用于测试的controller层:
@RestController
public class TestController {
@Autowired
TestService testService;
@RequestMapping("/test")
public TestObject savePerson(@RequestParam(value = "id") long id, @RequestParam(value = "name") String name) {
return testService.save(new TestObject(id, name));
}
@RequestMapping("/find")
public TestObject findByCode(@RequestParam(value = "id") long id) {
return testService.findTestObjectById(id);
}
}
启动类中需要注意添加注解@EnableIgniteRepositories,否则应用是无法识别通过@RepositoryConfig修饰的Bean:
@SpringBootApplication
@EnableIgniteRepositories
public class IgniteApplication {
public static void main(String[] args) {
SpringApplication.run(IgniteApplication.class, args);
}
}
启动应用后通过postman进行测试验证,首先创建一个TestObject的实例并塞入Ignite:
接下来通过id=12032进行查询:
成功返回!
整个实践过程中踩了不少坑,也是希望这篇随笔能为后面学习这块内容的同学节省一些时间吧。
https://ignite.apache.org/
https://www.oschina.net/p/apache-ignite?hmsr=aladdin1e1
https://www.infoq.cn/article/apache-ignite-explorer
https://blog.csdn.net/ltl112358/article/details/79399026
https://blog.csdn.net/qq_35051298/article/details/81452550
https://stackoverflow.com/questions/52652162/ignite-wont-start-with-spring-boot-2-0-5-h2-property-nested-joins-doesnt-exi
http://cn.voidcc.com/question/p-ofvlepsc-dr.html
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本文标题: SpringBoot整合Apache Ignite的实现
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