Question

我有一个QuartzJob，其中有多个方法调用相同的rest API。该类包含具有其余api配置的成员（configuration）。
使用getConfiguration方法初始化一次剩余的api配置。

public QuartzJob implements Job{
     @Value("${API_URL}")private String apiUrl;

     ApiCallConfiguration configuration = getConfiguration();

     method1(){call api using configuration  }
     method2(){call api using configuration  }
     method3(){call api using configuration  }
}

当我尝试创建构造函数时，它失败可能是因为尚未构造API值... @Value（“ $ {API_URL}”）private String apiUrl;
以下例外。

什么都设置好后，在QuartzJob中仅初始化一次配置属性的正确方法是什么？

Caused by: java.lang.NullPointerException: Configuration key     Caused by: java.lang.NullPointerException: Configuration key API_URL has no value
 at org.apache.commons.lang3.Validate.notBlank(Validate.java:451)
 at com.xerox.printerTech.quartz.jobs.PrinterVerificationJob.getPrinterRestApiConfig(PrinterVerificationJob.java:722)
 at com.xerox.printerTech.quartz.jobs.PrinterVerificationJob.<init>(PrinterVerificationJob.java:164)
 ... 10 more  has no value
 at org.apache.commons.lang3.Validate.notBlank(Validate.java:451)
 at com.xerox.printerTech.quartz.jobs.PrinterVerificationJob.getPrinterRestApiConfig(PrinterVerificationJob.java:722)
 at com.xerox.printerTech.quartz.jobs.PrinterVerificationJob.<init>(PrinterVerificationJob.java:164)
 ... 10 more

Answer 1

我能够使用@Component和@Autowired解决此问题
这是示例代码：

public QuartzJob implements Job{

    @Autowired
    ApiCallConfiguration configuration;

     method1(){configuration.getApiUrl();  }
     method2(){configuration.getApiUrl();  }
     method3(){configuration.getApiUrl();  }
}


@Component
public class ApiCallConfiguration {

    public ApiCallConfiguration(        
                @Value("${API_URL}")      String apiUrl,
                @Value("${API_URL_SSL}")  String apiUseSSL){
                this.apiUrl = apiUrl;
                this.apiUseSSL = apiUseSSL;
                }

    }

Spring with Quartz worker仅初始化一次成员？

1 个答案: