Question

此代码

private AlternatorDBClientV2 Client;

@Before
public void setUp() throws Exception {
    this.Client = new AlternatorDBClientV2();
}

给了我这个例外

java.lang.IllegalStateException: Unrecognized prefix for the AWS http client class name AlternatorDBClientV2
    at com.amazonaws.AmazonWebServiceClient.computeServiceName(AmazonWebServiceClient.java:546)
    at com.amazonaws.AmazonWebServiceClient.getServiceNameIntern(AmazonWebServiceClient.java:509)
    at com.amazonaws.AmazonWebServiceClient.configSigner(AmazonWebServiceClient.java:202)
    at com.amazonaws.AmazonWebServiceClient.setEndpoint(AmazonWebServiceClient.java:135)
    at com.michelboudreau.alternatorv2.AlternatorDBClientV2.setEndpoint(AlternatorDBClientV2.java:273)
    at com.michelboudreau.alternatorv2.AlternatorDBClientV2.init(AlternatorDBClientV2.java:109)
    at com.michelboudreau.alternatorv2.AlternatorDBClientV2.<init>(AlternatorDBClientV2.java:96)
    at com.michelboudreau.alternatorv2.AlternatorDBClientV2.<init>(AlternatorDBClientV2.java:91)
    at com.salesfront.test.CreateUserTest.setUp(CreateUserTest.java:51)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:27)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:30)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

Answer 1

堆栈跟踪行号表示您已在应用程序的 pom.xml 文件中配置了AWS Java SDK 1.6.8版。

我查看了AWS Java SDK项目的连续Git标记，我从它的GitHub网站克隆到我的工作站：

https://github.com/aws/aws-sdk-java

使用AWS Java SDK 1.6.4版构建Alternator项目并进行回归测试。

自AWS Java SDK 1.6.4以来，Amazon一直在添加逻辑来自动检测数据中心区域和服务，以便根据解析端点URL和特定子类的实际名称 AmazonWebServiceClient.java

Alternator仿真器客户端就是 AmazonWebServiceClient 的子类，但它们不符合预期的命名约定。

要使用当前版本的Alternator，您应该修改 pom.xml 以引用AWS Java SDK 1.6.4版。您可以尝试使用版本1.6.5,1.6.6或1.6.7，但绝对1.6.8与交流发电机不兼容。

Answer 2

Alternator GitHub存储库中有待处理的Pull Request可以解决此问题。

https://github.com/mboudreau/Alternator/pull/84

Answer 3

自最初答案以来，已经创建了更新版本的Alternator，允许使用AWS SDK for Java的更高版本1.6和1.7。

请参阅Alternator GitHub存储库的问题和请求部分：

https://github.com/mboudreau/Alternator

实例化时AlternatorDBClientV2异常

3 个答案: