天天操天天射天天,成人精品久久久,天天干人人

關于Ignite的介紹，這邊推薦三個鏈接進行學習了解。

https://ignite.apache.org/，首選還是官網，不過是英文版，如果閱讀比較吃力可以選擇下方兩個鏈接。

https://www.oschina.net/p/apache-ignite?hmsr=aladdin1e1，開源中國上對Ignite的介紹，包含特性、架構等內容，比較詳細。

https://www.infoq.cn/article/apache-ignite-explorer，這個鏈接中將Ignite與Redis、Hazelcast等同類型產品做了比較。

接下來我們開始實踐，首先需要在本地搭建一套Ignite服務，從官網上可以進行下載，https://ignite.apache.org/docs/latest/installation/installing-using-zip：

SpringBoot整合Apache Ignite的實現

這里需要注意的是，我們要下載的是安裝包，別下載了源碼。下載完畢后解壓，去到apache-ignite-2.8.1in目錄雙擊ignite.bat即可啟動服務：

SpringBoot整合Apache Ignite的實現

打印上圖中框出內容即為啟動成功，接下來我們創建一個Spring Boot項目用于整合Ignite的相關驗證，目錄結構如下：

SpringBoot整合Apache Ignite的實現

父工程的pom：

<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的版本推薦為1.5.X這類較為穩定的版本，從2.0.0開始的版本和Ignite會發生沖突，編譯時拋出如下錯誤：

Error:(8, 8) java: 名稱沖突: 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, 但兩者均不覆蓋對方

這里還需要注意一點，如果不指定h2的版本為1.4.197，啟動應用時會拋出如下異常：

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]

子模塊spring-boot-test-ignite中需要添加Ignite的依賴，版本需要與本地搭建的Ignite服務保持一致：

<dependency>
    <groupId>org.apache.ignite</groupId>
    <artifactId>ignite-spring-data</artifactId>
    <version>2.8.1</version>
</dependency>

接下來貼出Ignite的配置類IgniteConfig，通過動態IP發現綁定到本地的Ignite服務，同時創建實例與緩存供本地訪問：

@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);
    }
}

用于數據交互的測試類TestObject，注解@QuerySqlField的作用時告訴Ignite后續可以通過id字段發起查詢，如果沒有此注解也不影響數據的插入，但是查詢時會拋出Column not found的異常：

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;
    }
}

通過實現IgniteRepository來創建查詢方式：

@RepositoryConfig(cacheName = "TestCache")
public interface TestRepository extends IgniteRepository<TestObject, Long> {

    TestObject findById(long id);
}

再下來是用于測試的接口及其對應實現：

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);
    }
}

倒數第二步是編寫用于測試的controller層：

@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);
    }
}

啟動類中需要注意添加注解@EnableIgniteRepositories，否則應用是無法識別通過@RepositoryConfig修飾的Bean：

@SpringBootApplication
@EnableIgniteRepositories
public class IgniteApplication {

    public static void main(String[] args) {

        SpringApplication.run(IgniteApplication.class, args);
    }
}

啟動應用后通過postman進行測試驗證，首先創建一個TestObject的實例并塞入Ignite：

SpringBoot整合Apache Ignite的實現