Java Configuration.keySet方法代碼示例

import org.apache.flink.configuration.Configuration; //導入方法依賴的package包/類
/**
* Sets the value of a new config key to the value of a deprecated config key. Taking into
* account the changed prefix.
* @param config Config to write
* @param deprecatedPrefix Old prefix of key
* @param designatedPrefix New prefix of key
*/
public static void substituteDeprecatedConfigPrefix(
		Configuration config,
		String deprecatedPrefix,
		String designatedPrefix) {

	// set the designated key only if it is not set already
	final int prefixLen = deprecatedPrefix.length();

	Configuration replacement = new Configuration();

	for (String key : config.keySet()) {
		if (key.startsWith(deprecatedPrefix)) {
			String newKey = designatedPrefix + key.substring(prefixLen);
			if (!config.containsKey(newKey)) {
				replacement.setString(newKey, config.getString(key, null));
			}
		}
	}

	config.addAll(replacement);
}
 

import org.apache.flink.configuration.Configuration; //導入方法依賴的package包/類
public static ClusterConfigurationInfo from(Configuration config) {
	ClusterConfigurationInfo clusterConfig = new ClusterConfigurationInfo(config.keySet().size());

	for (String key : config.keySet()) {
		String value = config.getString(key, null);

		// Mask key values which contain sensitive information
		if (value != null && key.toLowerCase().contains("password")) {
			value = "******";
		}

		clusterConfig.add(new ClusterConfigurationInfoEntry(key, value));
	}

	return clusterConfig;
}
 

import org.apache.flink.configuration.Configuration; //導入方法依賴的package包/類
/**
 * Writes a Flink YAML config file from a Flink Configuration object.
 * @param cfg The Flink config
 * @param file The File to write to
 * @throws IOException
 */
public static void writeConfiguration(Configuration cfg, File file) throws IOException {
	try (FileWriter fwrt = new FileWriter(file);
		PrintWriter out = new PrintWriter(fwrt))
	{
		for (String key : cfg.keySet()) {
			String value = cfg.getString(key, null);
			out.print(key);
			out.print(": ");
			out.println(value);
		}
	}
}
 

import org.apache.flink.configuration.Configuration; //導入方法依賴的package包/類
private static String createConfigJson(Configuration config) {
	try {
		StringWriter writer = new StringWriter();
		JsonGenerator gen = JsonFactory.JACKSON_FACTORY.createGenerator(writer);

		gen.writeStartArray();
		for (String key : config.keySet()) {
			gen.writeStartObject();
			gen.writeStringField(ClusterConfigurationInfoEntry.FIELD_NAME_CONFIG_KEY, key);

			String value = config.getString(key, null);
			// Mask key values which contain sensitive information
			if (value != null && key.toLowerCase().contains("password")) {
				value = "******";
			}
			gen.writeStringField(ClusterConfigurationInfoEntry.FIELD_NAME_CONFIG_VALUE, value);

			gen.writeEndObject();
		}
		gen.writeEndArray();

		gen.close();
		return writer.toString();
	} catch (IOException e) {
		throw new CompletionException(new FlinkException("Could not write configuration.", e));
	}
}
 

import org.apache.flink.configuration.Configuration; //導入方法依賴的package包/類
@Test
public void testSubstituteConfigKeyPrefix() {
	String deprecatedPrefix1 ="deprecated-prefix";
	String deprecatedPrefix2 ="-prefix-2";
	String deprecatedPrefix3 ="prefix-3";

	String designatedPrefix1 ="p1";
	String designatedPrefix2 ="ppp";
	String designatedPrefix3 ="zzz";

	String depr1 = deprecatedPrefix1 + "var";
	String depr2 = deprecatedPrefix2 + "env";
	String depr3 = deprecatedPrefix2 + "x";

	String desig1 = designatedPrefix1 + "var";
	String desig2 = designatedPrefix2 + "env";
	String desig3 = designatedPrefix2 + "x";

	String val1 = "1";
	String val2 = "2";
	String val3_depr = "3-";
	String val3_desig = "3+";

	// config contains only deprecated key 1, and for key 2 both deprecated and designated
	Configuration cfg = new Configuration();
	cfg.setString(depr1, val1);
	cfg.setString(depr2, val2);
	cfg.setString(depr3, val3_depr);
	cfg.setString(desig3, val3_desig);

	BootstrapTools.substituteDeprecatedConfigPrefix(cfg, deprecatedPrefix1, designatedPrefix1);
	BootstrapTools.substituteDeprecatedConfigPrefix(cfg, deprecatedPrefix2, designatedPrefix2);
	BootstrapTools.substituteDeprecatedConfigPrefix(cfg, deprecatedPrefix3, designatedPrefix3);

	assertEquals(val1, cfg.getString(desig1, null));
	assertEquals(val2, cfg.getString(desig2, null));
	assertEquals(val3_desig, cfg.getString(desig3, null));

	// check that nothing with prefix 3 is contained
	for (String key : cfg.keySet()) {
		assertFalse(key.startsWith(designatedPrefix3));
		assertFalse(key.startsWith(deprecatedPrefix3));
	}
}