package org.oransc.policyagent.configuration;
-import com.google.gson.GsonBuilder;
-import com.google.gson.JsonElement;
-import com.google.gson.JsonObject;
-import com.google.gson.JsonParser;
-import com.google.gson.JsonSyntaxException;
-import com.google.gson.TypeAdapterFactory;
-
-import java.io.BufferedInputStream;
-import java.io.FileInputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.time.Duration;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
-import java.util.Properties;
-import java.util.ServiceLoader;
import java.util.Vector;
import javax.validation.constraints.NotEmpty;
import javax.validation.constraints.NotNull;
-import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.CbsClient;
-import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.CbsClientFactory;
-import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.CbsRequests;
-import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.model.CbsRequest;
-import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.model.EnvProperties;
-import org.onap.dcaegen2.services.sdk.rest.services.model.logging.RequestDiagnosticContext;
import org.oransc.policyagent.exceptions.ServiceException;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
-import reactor.core.Disposable;
-import reactor.core.publisher.Flux;
-import reactor.core.publisher.Mono;
-
@EnableConfigurationProperties
@ConfigurationProperties("app")
public class ApplicationConfig {
- private static final Logger logger = LoggerFactory.getLogger(ApplicationConfig.class);
-
- @Value("#{systemEnvironment}")
- Properties systemEnvironment;
+ @NotEmpty
+ private String filepath;
- private Disposable refreshConfigTask = null;
private Collection<Observer> observers = new Vector<>();
-
private Map<String, RicConfig> ricConfigs = new HashMap<>();
- @NotEmpty
- private String filepath;
-
@Autowired
public ApplicationConfig() {
}
- protected String getLocalConfigurationFilePath() {
+ public String getLocalConfigurationFilePath() {
return this.filepath;
}
throw new ServiceException("Could not find ric: " + ricName);
}
- public void initialize() {
- stop();
- loadConfigurationFromFile();
-
- refreshConfigTask = createRefreshTask() //
- .subscribe(notUsed -> logger.info("Refreshed configuration data"),
- throwable -> logger.error("Configuration refresh terminated due to exception", throwable),
- () -> logger.error("Configuration refresh terminated"));
- }
-
public static enum RicConfigUpdate {
ADDED, CHANGED, REMOVED
}
this.observers.add(o);
}
- Mono<EnvProperties> getEnvironment(Properties systemEnvironment) {
- return EnvironmentProcessor.readEnvironmentVariables(systemEnvironment);
- }
-
- Flux<ApplicationConfig> createRefreshTask() {
- return getEnvironment(systemEnvironment) //
- .flatMap(this::createCbsClient) //
- .flatMapMany(this::periodicConfigurationUpdates) //
- .map(this::parseRicConfigurationfromConsul) //
- .onErrorResume(this::onErrorResume);
- }
-
- Mono<CbsClient> createCbsClient(EnvProperties env) {
- return CbsClientFactory.createCbsClient(env);
- }
-
- private Flux<JsonObject> periodicConfigurationUpdates(CbsClient cbsClient) {
- final Duration initialDelay = Duration.ZERO;
- final Duration refreshPeriod = Duration.ofMinutes(1);
- final CbsRequest getConfigRequest = CbsRequests.getAll(RequestDiagnosticContext.create());
- return cbsClient.updates(getConfigRequest, initialDelay, refreshPeriod);
- }
-
- private <R> Mono<R> onErrorResume(Throwable trowable) {
- logger.error("Could not refresh application configuration {}", trowable.toString());
- return Mono.empty();
- }
-
- private ApplicationConfig parseRicConfigurationfromConsul(JsonObject jsonObject) {
- try {
- ApplicationConfigParser parser = new ApplicationConfigParser();
- parser.parse(jsonObject);
- setConfiguration(parser.getRicConfigs());
-
- } catch (ServiceException e) {
- logger.error("Could not parse configuration {}", e.toString(), e);
- }
- return this;
- }
-
private class Notification {
final RicConfig ric;
final RicConfigUpdate event;
}
}
- private void setConfiguration(@NotNull Collection<RicConfig> ricConfigs) {
+ public void setConfiguration(@NotNull Collection<RicConfig> ricConfigs) {
Collection<Notification> notifications = new Vector<>();
synchronized (this) {
Map<String, RicConfig> newRicConfigs = new HashMap<>();
}
}
}
-
- public void stop() {
- if (refreshConfigTask != null) {
- refreshConfigTask.dispose();
- refreshConfigTask = null;
- }
- }
-
- /**
- * Reads the configuration from file.
- */
- public void loadConfigurationFromFile() {
- String filepath = getLocalConfigurationFilePath();
- if (filepath == null) {
- logger.debug("No localconfiguration file used");
- return;
- }
- GsonBuilder gsonBuilder = new GsonBuilder();
- ServiceLoader.load(TypeAdapterFactory.class).forEach(gsonBuilder::registerTypeAdapterFactory);
-
- try (InputStream inputStream = createInputStream(filepath)) {
- JsonParser parser = new JsonParser();
- JsonObject rootObject = getJsonElement(parser, inputStream).getAsJsonObject();
- if (rootObject == null) {
- throw new JsonSyntaxException("Root is not a json object");
- }
- ApplicationConfigParser appParser = new ApplicationConfigParser();
- appParser.parse(rootObject);
- setConfiguration(appParser.getRicConfigs());
- logger.info("Local configuration file loaded: {}", filepath);
- } catch (JsonSyntaxException | ServiceException | IOException e) {
- logger.trace("Local configuration file not loaded: {}", filepath, e);
- }
- }
-
- JsonElement getJsonElement(JsonParser parser, InputStream inputStream) {
- return parser.parse(new InputStreamReader(inputStream));
- }
-
- InputStream createInputStream(@NotNull String filepath) throws IOException {
- return new BufferedInputStream(new FileInputStream(filepath));
- }
}