Spring Cloud 數據流服務器自定義構建 2.6.1

Question

我正在自定義構建 SCDF 2.6.1（我想專門構建這個版本）以添加 oracle 驅動程序。 下面是相同的 POM 配置。 我可以在 openshift 環境中成功構建。 但是當我啟動應用程序時，我得到以下異常。

例外：

2020-09-03 11:29:40.522  WARN 13716 --- [           main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.cloud.dataflow.completion.CompletionConfiguration': Unsatisfied dependency expressed through field 'streamDefinitionService'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'org.springframework.cloud.dataflow.core.StreamDefinitionService' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

Description:
Field streamDefinitionService in org.springframework.cloud.dataflow.completion.CompletionConfiguration required a bean of type 'org.springframework.cloud.dataflow.core.StreamDefinitionService' that could not be found.

The injection point has the following annotations:
        - @org.springframework.beans.factory.annotation.Autowired(required=true)

Action:

Consider defining a bean of type 'org.springframework.cloud.dataflow.core.StreamDefinitionService' in your configuration.

pom.xml

<?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">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.8.RELEASE</version>
        <relativePath />
    </parent>
    <groupId>com.example.com</groupId>
    <artifactId>BatchAdmin</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>FACAdmin</name>
    <description>Custom Build SCDF project</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Hoxton.SR4</spring-cloud.version>
        <spring-cloud-dataflow.version>2.6.1.RELEASE</spring-cloud-dataflow.version>
        <spring-security-oauth2.version>2.3.7.RELEASE</spring-security-oauth2.version>
        <mariadb.version>2.4.1</mariadb.version>
        <kubernetes-client.version>4.1.0</kubernetes-client.version>
        <nimbus-jose-jwt.version>8.17</nimbus-jose-jwt.version>
    </properties>

    <dependencies>
        <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-dataflow-server -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-dataflow-server</artifactId>
            <version>2.6.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dataflow-server-core</artifactId>
            <version>2.6.1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.security.oauth</groupId>
            <artifactId>spring-security-oauth2</artifactId>
            <version>${spring-security-oauth2.version}</version>
        </dependency>
        <dependency>
            <groupId>io.fabric8</groupId>
            <artifactId>kubernetes-client</artifactId>
            <version>${kubernetes-client.version}</version>
        </dependency>
        <dependency>
            <groupId>com.nimbusds</groupId>
            <artifactId>nimbus-jose-jwt</artifactId>
            <version>${nimbus-jose-jwt.version}</version>
        </dependency>
        <dependency>
            <groupId>com.oracle.database.jdbc</groupId>
            <artifactId>ojdbc8</artifactId>
            <version>12.2.0.1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

    <repositories>
        <repository>
            <id>spring-release</id>
            <name>Spring Releases</name>
            <url>https://repo.spring.io/release</url>
        </repository>
    </repositories>
</project>

正如錯誤中所建議的，我嘗試在我的自定義構建項目主類中提供 bean。 但它引發了另一個與任務相關的錯誤。

StreamDefinitionService Bean 方法

public static void main(String[] args) {
        SpringApplication.run(CustomDataflowServerApplication.class, args);
    }

    @Bean
    public StreamDefinitionService getStreamDefinitionService() {
        return new StreamDefinitionService() {

            @Override
            public String redactDsl(StreamDefinition streamDefinition) {
                // TODO Auto-generated method stub
                return null;
            }

            @Override
            public StreamNode parse(StreamDefinition streamDefinition) {
                // TODO Auto-generated method stub
                return null;
            }

            @Override
            public LinkedList<StreamAppDefinition> getAppDefinitions(StreamDefinition streamDefinition) {
                // TODO Auto-generated method stub
                return null;
            }

            @Override
            public String constructDsl(String originalDslText, LinkedList<StreamAppDefinition> streamAppDefinitions) {
                // TODO Auto-generated method stub
                return null;
            }
        };
    }

當我添加上述方法時，出現以下錯誤。

[org.springframework.cloud.dataflow.server.service.TaskExecutionInfoService]: Factory method 'taskDefinitionRetriever' threw exception; nested exception is java.lang.IllegalArgumentException: taskPlatform must not be empty or null

我不會在我的項目中使用 Stream。 我的興趣只是任務。 因此，如果無論如何要排除流功能以避免上述錯誤？

Answer 1

如果您只是嘗試將 Oracle 驅動程序添加到 SCDF/Skipper Spring Boot 應用程序，那么您只需要在類路徑中將相應的 uber-jar 與額外的驅動程序 jar 打包。

我們有關於如何只添加您選擇的驅動程序的文檔。 在Adding JDBC Driver部分下查找特定步驟。

我們還有成熟的 SCDF 定制構建示例——請隨意使用以供參考。