Examples with StandardStateProviderInitializationContext org.apache.nifi.controller.state.StandardStateProviderInitializationContext used on opensource projects

Example 1 with StandardStateProviderInitializationContext

use of org.apache.nifi.controller.state.StandardStateProviderInitializationContext in project nifi by apache.

the class StandardStateManagerProvider method createStateProvider.

private static StateProvider createStateProvider(final File configFile, final Scope scope, final NiFiProperties properties, final VariableRegistry variableRegistry) throws ConfigParseException, IOException {
    final String providerId;
    final String providerIdPropertyName;
    final String providerDescription;
    final String providerXmlElementName;
    final String oppositeScopeXmlElementName;
    switch(scope) {
        case CLUSTER:
            providerId = properties.getClusterStateProviderId();
            providerIdPropertyName = NiFiProperties.STATE_MANAGEMENT_CLUSTER_PROVIDER_ID;
            providerDescription = "Cluster State Provider";
            providerXmlElementName = "cluster-provider";
            oppositeScopeXmlElementName = "local-provider";
            break;
        case LOCAL:
            providerId = properties.getLocalStateProviderId();
            providerIdPropertyName = NiFiProperties.STATE_MANAGEMENT_LOCAL_PROVIDER_ID;
            providerDescription = "Local State Provider";
            providerXmlElementName = "local-provider";
            oppositeScopeXmlElementName = "cluster-provider";
            break;
        default:
            throw new AssertionError("Attempted to create State Provider for unknown Scope: " + scope);
    }
    if (!configFile.exists()) {
        throw new IllegalStateException("Cannot create " + providerDescription + " because the State Management Configuration File " + configFile + " does not exist");
    }
    if (!configFile.canRead()) {
        throw new IllegalStateException("Cannot create " + providerDescription + " because the State Management Configuration File " + configFile + " cannot be read");
    }
    if (providerId == null) {
        if (scope == Scope.CLUSTER) {
            throw new IllegalStateException("Cannot create Cluster State Provider because the '" + providerIdPropertyName + "' property is missing from the NiFi Properties file. In order to run NiFi in a cluster, the " + providerIdPropertyName + " property must be configured in nifi.properties");
        }
        throw new IllegalStateException("Cannot create " + providerDescription + " because the '" + providerIdPropertyName + "' property is missing from the NiFi Properties file");
    }
    if (providerId.trim().isEmpty()) {
        throw new IllegalStateException("Cannot create " + providerDescription + " because the '" + providerIdPropertyName + "' property in the NiFi Properties file has no value set. This is a required property and must reference the identifier of one of the " + providerXmlElementName + " elements in the State Management Configuration File (" + configFile + ")");
    }
    final StateManagerConfiguration config = StateManagerConfiguration.parse(configFile);
    final StateProviderConfiguration providerConfig = config.getStateProviderConfiguration(providerId);
    if (providerConfig == null) {
        throw new IllegalStateException("Cannot create " + providerDescription + " because the '" + providerIdPropertyName + "' property in the NiFi Properties file is set to '" + providerId + "', but there is no " + providerXmlElementName + " entry in the State Management Configuration File (" + configFile + ") with this id");
    }
    if (providerConfig.getScope() != scope) {
        throw new IllegalStateException("Cannot create " + providerDescription + " because the '" + providerIdPropertyName + "' property in the NiFi Properties file is set to '" + providerId + "', but this id is assigned to a " + oppositeScopeXmlElementName + " entry in the State Management Configuration File (" + configFile + "), rather than a " + providerXmlElementName + " entry");
    }
    final String providerClassName = providerConfig.getClassName();
    final StateProvider provider;
    try {
        provider = instantiateStateProvider(providerClassName);
    } catch (final Exception e) {
        throw new RuntimeException("Cannot create " + providerDescription + " of type " + providerClassName, e);
    }
    if (!ArrayUtils.contains(provider.getSupportedScopes(), scope)) {
        throw new RuntimeException("Cannot use " + providerDescription + " (" + providerClassName + ") as it only supports scope(s) " + ArrayUtils.toString(provider.getSupportedScopes()) + " but " + "instance" + " is configured to use scope " + scope);
    }
    // create variable registry
    final Map<PropertyDescriptor, PropertyValue> propertyMap = new HashMap<>();
    final Map<PropertyDescriptor, String> propertyStringMap = new HashMap<>();
    for (final PropertyDescriptor descriptor : provider.getPropertyDescriptors()) {
        propertyMap.put(descriptor, new StandardPropertyValue(descriptor.getDefaultValue(), null, variableRegistry));
        propertyStringMap.put(descriptor, descriptor.getDefaultValue());
    }
    for (final Map.Entry<String, String> entry : providerConfig.getProperties().entrySet()) {
        final PropertyDescriptor descriptor = provider.getPropertyDescriptor(entry.getKey());
        propertyStringMap.put(descriptor, entry.getValue());
        propertyMap.put(descriptor, new StandardPropertyValue(entry.getValue(), null, variableRegistry));
    }
    final SSLContext sslContext = SslContextFactory.createSslContext(properties, false);
    final ComponentLog logger = new SimpleProcessLogger(providerId, provider);
    final StateProviderInitializationContext initContext = new StandardStateProviderInitializationContext(providerId, propertyMap, sslContext, logger);
    synchronized (provider) {
        provider.initialize(initContext);
    }
    final ValidationContext validationContext = new StandardValidationContext(null, propertyStringMap, null, null, null, variableRegistry);
    final Collection<ValidationResult> results = provider.validate(validationContext);
    final StringBuilder validationFailures = new StringBuilder();
    int invalidCount = 0;
    for (final ValidationResult result : results) {
        if (!result.isValid()) {
            validationFailures.append(result.toString()).append("\n");
            invalidCount++;
        }
    }
    if (invalidCount > 0) {
        throw new IllegalStateException("Could not initialize State Providers because the " + providerDescription + " is not valid. The following " + invalidCount + " Validation Errors occurred:\n" + validationFailures.toString() + "\nPlease check the configuration of the " + providerDescription + " with ID [" + providerId.trim() + "] in the file " + configFile.getAbsolutePath());
    }
    return provider;
}