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Validators

Validators can be used to validate user input and to generate client side error messages when invalid input is provided by a user. Validators prevent users from entering invalid data. Validators are Java classes that implement the org.springframework.validation.Validator interface. This interface provides two methods:

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As a result the message “Text may not be empty” will be displayed if the user input was invalid:

 

 

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HTTP Client


The java.net package part of the Java 1.6 API provides a basic set of classes which can be used to handle HTTP GET and POST requests. However, in some cases a more powerful HTTP client API is needed. The commons HTTP client (org.apache.commons.httpclient.HttpClient) may be a better alternative for those cases.

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Code Block
themeEclipse
private static void configureHttpClient2Proxy(HttpClient httpClient, HttpMethod method) {
	String proxyHost = System.getProperty("http.proxyHost");
	if (proxyHost == null || "".equals(proxyHost)) {
		return;
	}
	try {
		org.apache.commons.httpclient.URI apacheUri = method.getURI();
		java.net.URI javaUri = null;
		if (apacheUri.isAbsoluteURI()==false) {
			javaUri = new 
			java.net.URI(httpClient.getHostConfiguration().getHostURL());
	} else {
		javaUri = new java.net.URI(apacheUri.toString());
	}
	// ProxySelector
	List<Proxy> selectedProxy = 
	ProxySelector.getDefault().select(javaUri);
	if (selectedProxy.size()==0 || 
	selectedProxy.get(0).type()==Proxy.Type.DIRECT) {
		// No proxy needed.
		return;
	}
	HostConfiguration hc = httpClient.getHostConfiguration();
	hc.setHost(javaUri.getHost(), javaUri.getPort(), 
	Protocol.getProtocol(javaUri.getScheme()));
	Proxy proxy = selectedProxy.get(0);
	InetSocketAddress proxyAddress = (InetSocketAddress) proxy.address();
	hc.setProxy(proxyAddress.getHostName(),proxyAddress.getPort());
	if (System.getProperty("http.proxyUserName") != null) {
		httpClient.getState().setProxyCredentials(null, null,
			new UsernamePasswordCredentials(System.getProperty("http.proxyUserName"), System.getProperty("http.proxyPassword")));
		httpClient.getState().setAuthenticationPreemptive(true);
	}


  } catch (URISyntaxException ex) {
		LOG.log(Level.WARNING, null, ex);
  } catch (URIException ex) {
		lOG.log(Level.WARNING, null, ex);
  }
}

 

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Anchor
adding_custom_indicators_to_the_performance_dashboard
adding_custom_indicators_to_the_performance_dashboard
Adding Custom Indicators to the Performance Dashboard

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Code Block
themeEclipse
public class CustomServiceImpl extends SimpleServiceComponent implements SystemHealthIndicatorExtensionPoint {
	// Private logger for this class
	private static final Logger LOG = Logger.getLogger(CustomServiceImpl.class.getName());
	public SystemHealthIndicator[] getPerformanceIndicators() {
	return new SystemHealthIndicator[] {new CustomPI()};
	}

	class CustomPI implements SystemHealthIndicator{
		public String getId() {return "testPI";};
		public String getCategory() {return "my category";}
		public String getType() {return TYPE_CUSTOM;};
		public String getName(Language language) {return "test custom PI";}
		public Object getValue() {return myCache.getCacheRatio;}
		public ValueStatus getValueState() {return myValueStatus;}
		public String getMessage(Language language) {return "test custom PI";}
		public void reset() {}
	}
}

 

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Creating an Extension for the User Profiles Component

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This implementation comes from the CustomProfileProviderImpl interface. The methods are part of the ProfileExtensionProvider interface.

 

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Creating Workflow Action Constraints

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