odata如何使用SAP Cloud SDK 3.2.0在Java中检索目标？
我正在开发一个使用SAP Cloud SDK版本3.2.0的Java应用程序。我怀疑目的地是如何被找回的。当我通过在本地机器上运行应用程序来测试应用程序时，我可以向公开的OData服务发送POST请求，而不会出现问题，问题是当我在Neo环境的SAP云平台开发帐户中部署应用程序时，在这里，我创建了一个名为ErpQueryEndpoint的目的地，并使用SAP Cloud Connector建立连接，如下所示：
这是应用程序代码，首先调用bpCreateExtended方法，然后调用executeAsyncCall方法，这将异步执行：
public Object executeAsyncCall(BpCreateBasicRequest bpCreateRequest) {
...
try {
ODataCreateRequestImpl createRequest = new ODataCreateRequestImpl("/sap/opu/odata/sap/ZAS_BP_CREATION_SRV",
"BP_DATASet", bodyAsMap, null, null, null, headersAsMap, null, false, null, null, false);
//Creating destination at runtime
DefaultDestination dest = DefaultDestination.builder()
.property("Name", "ErpQueryEndpoint")
.property("URL", "http://crmdev:4431")
.property("Type", "HTTP")
.property("Authentication", "BasicAuthentication")
.property("User", abapUser)
.property("Password", abapPass)
.build();
HttpDestination destination = dest.asHttp();
HttpClient httpClient = HttpClientAccessor.getHttpClient(destination);
Map<String, Object> resp = createRequest.execute(httpClient).asMap();
jsonResponse = new JSONObject(resp);
} catch (HttpServerErrorException e) {
logger.info("504 Gateway Timeout first steep. SCP Timeout " + e.getMessage());
} catch (Exception e) {
e.printStackTrace();
}
...
return jsonResponse;
}
public Object bpCreateExtended(BpCreateBasicRequest bpCreateRequest) throws IOException {
this.conf = ResilienceConfiguration.of(AccountBFimpl.class);
Object response = null;
CompletableFuture<Object> futureFirstSteep = ResilienceDecorator.queueCallable(() ->
executeAsyncCall(bpCreateRequest), conf);
return (JSONObject) response;
}
如果应用程序已部署在SAP Cloud Platform Neo开发帐户中，则发送POST请求时会出现以下错误：
ERROR#com.sap.cloud.sdk.odatav2.connectivity.cache.metadata.GuavaMetadataCache##S0020495660#ForkJoinPool.commonPool-worker-2#na#gfna57xvah#atlantidaapi#web##na#na#na#na#Error occurred while populating metadata : java.net.UnknownHostException: crmdev: Name or service not known
在executeAsyncCall方法中，我在运行时创建目标，但我不知道实现是否正确，或者我是否可以做一些不同的事情来在SAP Cloud Platform中获取开发帐户的目标。有人能帮我找到解决办法吗
这是我的pom的内容。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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.atlantida.services</groupId>
<artifactId>account</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>atlantida</name>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.sap.cloud.sdk</groupId>
<artifactId>sdk-bom</artifactId>
<version>3.2.0</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<properties>
<java-version>1.8</java-version>
<springframework.version>5.1.8.RELEASE</springframework.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<junit.version>4.11</junit.version>
<jackson-version>2.9.2</jackson-version>
<lombok.version>1.18.8</lombok.version>
<jcl.slf4j.version>1.7.12</jcl.slf4j.version>
<logback.version>1.1.3</logback.version>
<!-- if you are behind a proxy use the following two properties to configure your proxy. Default: None -->
<proxy.host />
<proxy.port />
<non.proxy.hosts />
<!-- Properties that are related to the SAP Cloud Platform. -->
<scp.sdkVersion>1.44.12</scp.sdkVersion>
<!-- this is the location of your local SAP CP Neo runtime -->
<scp.sdkInstallPath>${project.basedir}/scp/sdk-${scp.sdkVersion}</scp.sdkInstallPath>
<scp.sdkLocalServerContentPath>${project.basedir}/localServerContent</scp.sdkLocalServerContentPath>
<scp.sdkErpEndpoint>${scp.sdkInstallPath}/server/config_master/service.destinations/destinations/ErpQueryEndpoint</scp.sdkErpEndpoint>
<scp.sdkSymbolicLink>${project.basedir}/scp/sdk</scp.sdkSymbolicLink>
<scp.sdkNeoCmdExtension>.sh</scp.sdkNeoCmdExtension>
<scp.sdkNeoCmd>${scp.sdkInstallPath}/tools/neo${scp.sdkNeoCmdExtension}</scp.sdkNeoCmd>
<scp.sdkLocalServer>${scp.sdkInstallPath}/server</scp.sdkLocalServer>
<scp.skipInstallSdk>false</scp.skipInstallSdk>
<scp.skipDeploy>false</scp.skipDeploy>
<scp.skipPutDestination>false</scp.skipPutDestination>
<scp.skipRestart>false</scp.skipRestart>
<scp.skipRollingUpdate>true</scp.skipRollingUpdate>
<scp.vmArguments />
<scp.vmSize>lite</scp.vmSize>
<scp.vmMinProcesses>1</scp.vmMinProcesses>
<scp.vmMaxProcesses>1</scp.vmMaxProcesses>
<scp.app />
<scp.host />
<scp.account />
<scp.username />
<scp.password />
<!-- Required for SAP CP user session management and audit logging. -->
<scp.warImportPackage>com.sap.security.auth.service,com.sap.security.um.service.api,com.sap.core.service.auditlog.impl,com.sap.cloud.auditlog,com.sap.cloud.auditlog.exception,com.sap.cloud.auditlog.extension</scp.warImportPackage>
<!-- Defines whether the deployment is productive or not. -->
<productive />
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${springframework.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>${jackson-version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson-version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-jsr310</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.googlecode.json-simple</groupId>
<artifactId>json-simple</artifactId>
<version>1.1.1</version>
</dependency>
<!-- Bridge logging from JCL to SLF4j -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>${jcl.slf4j.version}</version>
</dependency>
<!-- logback -->
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>${logback.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.json/json -->
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20190722</version>
</dependency>
<dependency>
<groupId>com.sap.cloud.sdk.cloudplatform</groupId>
<artifactId>scp-neo</artifactId>
</dependency>
<dependency>
<groupId>com.sap.cloud.servicesdk</groupId>
<artifactId>odatav2-connectivity</artifactId>
<version>1.32.5</version>
</dependency>
<dependency>
<groupId>com.sap.cloud.sdk.cloudplatform</groupId>
<artifactId>security-servlet</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>javax.inject</groupId>
<artifactId>javax.inject</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.sap.cloud</groupId>
<artifactId>neo-javaee7-wp-api</artifactId>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<finalName>atlantida</finalName>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-enforcer-plugin</artifactId>
<version>3.0.0-M2</version>
<executions>
<execution>
<id>SAP Cloud SDK Project Structure Checks</id>
<goals>
<goal>enforce</goal>
</goals>
<configuration>
<rules>
<requireMavenVersion>
<version>3.5</version>
</requireMavenVersion>
<requireJavaVersion>
<version>${java.version}</version>
</requireJavaVersion>
<reactorModuleConvergence />
</rules>
<fail>true</fail>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.2</version>
<configuration>
<attachClasses>true</attachClasses>
<archive>
<manifestEntries>
<Version>${project.version}</Version>
<Import-Package>${scp.warImportPackage}</Import-Package>
</manifestEntries>
</archive>
<webResources>
<resources>
<filtering>true</filtering>
<directory>src/main/webapp</directory>
<includes>
<include>**/web.xml</include>
</includes>
</resources>
</webResources>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>3.1.1</version>
<configuration>
<artifactItems>
<artifactItem>
<groupId>com.sap.cloud</groupId>
<artifactId>neo-javaee7-wp-sdk</artifactId>
<version>${scp.sdkVersion}</version>
<type>zip</type>
<overWrite>false</overWrite>
<outputDirectory>${scp.sdkInstallPath}</outputDirectory>
</artifactItem>
</artifactItems>
</configuration>
</plugin>
<!-- Plugin for deployment to SAP Cloud Platform Neo. -->
<plugin>
<groupId>com.sap.cloud</groupId>
<artifactId>neo-javaee7-wp-maven-plugin</artifactId>
<version>${scp.sdkVersion}</version>
<executions>
<execution>
<id>stop</id>
<phase>install</phase>
<goals>
<goal>stop</goal>
</goals>
<configuration>
<skip>${scp.skipRestart}</skip>
</configuration>
</execution>
<execution>
<id>deploy</id>
<phase>install</phase>
<goals>
<goal>deploy</goal>
</goals>
<configuration>
<skip>${scp.skipDeploy}</skip>
<vmArguments>${scp.vmArguments}</vmArguments>
</configuration>
</execution>
<execution>
<id>start</id>
<phase>install</phase>
<goals>
<goal>start</goal>
</goals>
<configuration>
<skip>${scp.skipRestart}</skip>
</configuration>
</execution>
<execution>
<id>rolling-update</id>
<phase>install</phase>
<goals>
<goal>rolling-update</goal>
</goals>
<configuration>
<skip>${scp.skipRollingUpdate}</skip>
</configuration>
</execution>
</executions>
<configuration>
<sdkInstallPath>${scp.sdkInstallPath}</sdkInstallPath>
<skip>${scp.skipInstallSdk}</skip>
<application>${scp.app}</application>
<source>${project.build.directory}/${project.build.finalName}.war</source>
<vmArguments>${scp.vmArguments}</vmArguments>
<size>${scp.vmSize}</size>
<minimumProcesses>${scp.vmMinProcesses}</minimumProcesses>
<maximumProcesses>${scp.vmMaxProcesses}</maximumProcesses>
<host>${scp.host}</host>
<account>${scp.account}</account>
<user>${scp.username}</user>
<password>${scp.password}</password>
<synchronous>true</synchronous>
<httpProxyHost>${proxy.host}</httpProxyHost>
<httpProxyPort>${proxy.port}</httpProxyPort>
<httpsProxyHost>${proxy.host}</httpsProxyHost>
<httpsProxyPort>${proxy.port}</httpsProxyPort>
<consoleCommand />
<consoleHttpProxyHost>${proxy.host}</consoleHttpProxyHost>
<consoleHttpProxyPort>${proxy.port}</consoleHttpProxyPort>
<consoleHttpsProxyHost>${proxy.host}</consoleHttpsProxyHost>
<consoleHttpsProxyPort>${proxy.port}</consoleHttpsProxyPort>
<dbsystem />
<dbSize />
<dbUser />
</configuration>
</plugin>
<!-- Plugin for deployment to local runtime of SAP Cloud Platform Neo. -->
<plugin>
<groupId>com.sap.cloud.sdk.plugins</groupId>
<artifactId>scp-neo-maven-plugin</artifactId>
<version>3.2.0</version>
<configuration>
<sdkPlugin>neo-javaee7-wp-maven-plugin</sdkPlugin>
<sdkPluginVersion>${scp.sdkVersion}</sdkPluginVersion>
<sdkInstallPath>${scp.sdkInstallPath}</sdkInstallPath>
<sdkSymbolicLink>${scp.sdkSymbolicLink}</sdkSymbolicLink>
<sdkServerContentPath>${scp.sdkLocalServerContentPath}</sdkServerContentPath>
<source>${project.build.directory}/${project.build.finalName}.war</source>
<proxyHost>${proxy.host}</proxyHost>
<proxyPort>${proxy.port}</proxyPort>
<httpNonProxyHosts>${non.proxy.hosts}</httpNonProxyHosts>
<destinations>
<destination>
<path>${scp.sdkErpEndpoint}</path>
<username>achacon</username>
<password>****</password>
<url>http://crmdev:4431</url>
</destination>
</destinations>
</configuration>
</plugin>
</plugins>
</pluginManagement>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>com.sap.cloud.sdk.plugins</groupId>
<artifactId>usage-analytics-maven-plugin</artifactId>
<version>3.2.0</version>
<executions>
<execution>
<goals>
<goal>usage-analytics</goal>
</goals>
<configuration>
<skipUsageAnalytics>false</skipUsageAnalytics>
<generateSalt>true</generateSalt>
<!--
Note: A random salt is auto-generated once the project is built for the first time.
Please keep the generated salt in the POM file, for example, when pushing to git.
To learn more, visit: https://blogs.sap.com/2018/10/23/usage-analytics-s4sdk/
-->
<salt>5d5e4e1e8a5f05d547fe8880f65173bda150a670f91f3657b970eaa9e7a4d392</salt>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
<profiles>
<!--
Profiles that are used to set the Neo SDK "neo" command extension ("neo.sh" or "neo.cmd")
-->
<profile>
<id>windows</id>
<activation>
<os>
<family>windows</family>
</os>
</activation>
<properties>
<scp.sdkNeoCmdExtension>.bat</scp.sdkNeoCmdExtension>
</properties>
</profile>
<profile>
<id>unix</id>
<activation>
<os>
<family>unix</family>
</os>
</activation>
<properties>
<scp.sdkNeoCmdExtension>.sh</scp.sdkNeoCmdExtension>
</properties>
</profile>
<!-- Profile setting properties for deploying to the local SAP CP runtime. -->
<profile>
<id>local-deploy</id>
<activation>
<property>
<name>!scp.app</name>
</property>
</activation>
<properties>
<scp.skipInstallSdk>true</scp.skipInstallSdk>
<scp.skipDeploy>true</scp.skipDeploy>
<scp.skipPutDestination>true</scp.skipPutDestination>
<scp.skipRestart>true</scp.skipRestart>
<scp.skipRollingUpdate>true</scp.skipRollingUpdate>
</properties>
</profile>
<!-- Profile setting properties for deploying a productive version to SAP CP. -->
<profile>
<id>scp-deploy</id>
<activation>
<property>
<name>productive</name>
</property>
</activation>
<properties>
<scp.skipInstallSdk>false</scp.skipInstallSdk>
<scp.skipDeploy>true</scp.skipDeploy>
<scp.skipPutDestination>false</scp.skipPutDestination>
<scp.skipRestart>true</scp.skipRestart>
<scp.skipRollingUpdate>false</scp.skipRollingUpdate>
</properties>
</profile>
</profiles>
</project>
这是我的ErpQueryEndpoint文件：https://i.imgur.com/jIWsa4o.jpg
# 1 楼答案
而不是
请使用
您不必手动创建目的地
或者，您也可以使用：
原因：默认情况下，目的地使用代理类型“Internet”（无代理），但您希望“OnPremise”与云连接器建立连接
更新：使用SAP Cloud SDK3时，请同时使用服务SDK的合适依赖项。这意味着，不是
使用：
# 2 楼答案
我按照Alex的建议设法解决了问题，并在CompletableFuture下面添加了以下代码行：
在这种情况下，CompletableFuture课程的
get(long, TimeUnit)方法是成功的关键，虽然我不知道为什么等待这5秒钟来响应请求，是在我使用ResilienceDecorator的queueCallable方法异步执行代码时防止生成错误的原因。非常感谢你们的帮助Alex和Emdee