问题是让Spring PropertyPlaceholderConfigurer覆盖MessageSource值

时间:2011-01-12 23:11:48

标签: spring spring-mvc velocity

我有一个Spring Java配置对象,它加载我的属性,但不会覆盖MessageSource令牌。

@Configuration
@SuppressWarnings("unused")
public class PropertyConfiguration {

public static final String PROPERTY_OVERRIDE_URL = "d2.config.location";

@Bean
public UrlResource propertyOverrideUrl() {
    String propertyOverrideUrl = System.getProperty(PROPERTY_OVERRIDE_URL);

    UrlResource overrideUrl = null;
    // just add a bogus url as to not get a malformed URL
    try{
        overrideUrl = new UrlResource(
                (propertyOverrideUrl == null || "".equals(propertyOverrideUrl)? "file:///FILENOTFOUND" : propertyOverrideUrl)
        );
    } catch (MalformedURLException e){
        // Set the URL to a dummy value so it will not break.
        try{
            overrideUrl = new UrlResource("file:///FILENOTFOUND");
        } catch (MalformedURLException me){
            // this is a valid URL, but will not be found at runtime.
        }
    }
    return overrideUrl;
}

@Bean
@DependsOn("propertyOverrideUrl")
@Lazy(false)
public ContextAwarePropertyPlaceholderConfigurer propertyPlaceholderConfigurer()
throws IOException{
    return new ContextAwarePropertyPlaceholderConfigurer(){{
        setLocations(new Resource[]{
            new ClassPathResource("application_prompts.properties"),
            new ClassPathResource("application_webservice.properties"),
            new ClassPathResource("application_externalApps.properties"),
            new ClassPathResource("application_log4j.properties"),
            new ClassPathResource("application_fileupload.properties"),
            //Must be last to override all other resources
            propertyOverrideUrl()
        });
        setIgnoreResourceNotFound(true);
    }};
}

当我在javaconfig属性上运行单元测试时,它很好:

    @Test
public void testOverrides__Found() throws Exception {
    setOverrideUrlSystemProperty("/target/test/resources/override-test.properties");
    context = SpringContextConfigurationTestHelper.createContext();
    context.refresh();

    String recordedPaymentConfirmationPath =
            (String)context.getBean("recordedPaymentConfirmationPath");
    assertThat(recordedPaymentConfirmationPath, is("test/dir/recordings/"));

    String promptServerUrl =
            (String)context.getBean("promptServerUrl");
    assertThat(promptServerUrl, is("http://test.url.com"));
}

但是当我尝试使用MessageSource的值时,它仍然具有旧值:

    @Test
public void testOverrides__XYZ() throws Exception {
    setOverrideUrlSystemProperty("/target/test/resources/override-test.properties");
    context = SpringContextConfigurationTestHelper.createContext();
    context.refresh();

    String promptServerUrl = (String)context.getMessage("uivr.prompt.server.url",
                    new Object[] {}, Locale.US);

    assertThat(promptServerUrl, is("http://test.url.com"));
}

输出:

[junit] Testcase: testOverrides__XYZ took 0.984 sec
[junit]     FAILED
[junit]
[junit] Expected: is "http://test.url.com"
[junit]      got: "http://24.40.46.66:9010/agent-ivr-prompts/"
[junit]
[junit] junit.framework.AssertionFailedError:
[junit] Expected: is "http://test.url.com"
[junit]      got: "http://24.40.46.66:9010/agent-ivr-prompts/"
[junit]
[junit]     at     com.comcast.ivr.agent.configuration.PropertyOverrideConfigurationTest.testOverrides__XYZ(PropertyOverrideConfigurationTest.java:114)

有人可以帮我找到覆盖MessageSource的方法,因为这是我们的力度模板中使用的方法:

    #set($baseUrl = "#springMessage('uivr.prompt.server.url')")

我添加了一些日志记录:

  @Override
  protected void loadProperties(Properties props) throws IOException {
    super.loadProperties(props);
    super.mergeProperties();
    if(logger.isDebugEnabled()){
        System.out.println("--------------------");
        for (Map.Entry entry : props.entrySet()) {
            System.out.println(entry.getKey() + ":" + entry.getValue());
            logger.info(entry.getKey() + ":" + entry.getValue());
        }
        System.out.println("--------------------");
    }
}

并按预期打印值。

...
[junit] uivr.prompt.server.url:http://test.url.com
...

1 个答案:

答案 0 :(得分:0)

关于propertyPlaceholderConfigurer() @Bean方法中使用的注释的几个附注:

  • @ Lazy(false)是不必要的,因为它已经是默认值。你可以省略这个。
  • @DependsOn("propertyOverrideUrl")是不必要的,因为已经通过在propertyOverrideUrl()
  • 内调用propertyPlaceholderConfigurer()来确定依赖关系

关于你的实际问题,回答有点困难因为我不确定ContextAwareProperyPlaceholderConfigurer是做什么的(我假设它是一个自定义组件,因为它不是核心Spring框架的一部分)。

除此之外,可能只会出现误解。 Spring的PropertyPlaceholderConfigurer(PPC)和朋友通过后处理bean定义来替换${...}占位符,但不以任何方式与MessageSource个对象交互。所以你所描述的行为,我相信,正如预期的那样:你会在询问bean时看到'正确'的URL(因为它已被你的PPC后处理),但是在查询消息时你会看到'错误的'url来源(因为它与PPC后处理完全无关)。

希望这有帮助。