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This closes apache#5530 Signed-off-by: David Handermann <exceptionfactory@apache.org>
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38 changes: 38 additions & 0 deletions
38
...ialization-services/src/main/java/org/apache/nifi/cef/CEFCustomExtensionTypeResolver.java
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You under the Apache License, Version 2.0 | ||
| * (the "License"); you may not use this file except in compliance with | ||
| * the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package org.apache.nifi.cef; | ||
|
|
||
| import org.apache.nifi.serialization.record.DataType; | ||
| import org.apache.nifi.serialization.record.RecordFieldType; | ||
| import org.apache.nifi.util.SchemaInferenceUtil; | ||
|
|
||
| /** | ||
| * Provides strategy for resolving data type for custom extensions. | ||
| */ | ||
| interface CEFCustomExtensionTypeResolver { | ||
|
|
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| /** | ||
| * @param value String representation of the field value. | ||
| * | ||
| * @return The resolved data type matches the given value most, based on the implemented strategy. | ||
| */ | ||
| DataType resolve(String value); | ||
|
|
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| CEFCustomExtensionTypeResolver STRING_RESOLVER = value -> RecordFieldType.STRING.getDataType(); | ||
| CEFCustomExtensionTypeResolver SIMPLE_RESOLVER = value -> SchemaInferenceUtil.getDataType(value); | ||
| CEFCustomExtensionTypeResolver SKIPPING_RESOLVER = value -> null; | ||
| } |
241 changes: 241 additions & 0 deletions
241
...undle/nifi-record-serialization-services/src/main/java/org/apache/nifi/cef/CEFReader.java
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You under the Apache License, Version 2.0 | ||
| * (the "License"); you may not use this file except in compliance with | ||
| * the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package org.apache.nifi.cef; | ||
|
|
||
| import com.fluenda.parcefone.parser.CEFParser; | ||
| import org.apache.bval.jsr.ApacheValidationProvider; | ||
| import org.apache.nifi.annotation.documentation.CapabilityDescription; | ||
| import org.apache.nifi.annotation.documentation.Tags; | ||
| import org.apache.nifi.annotation.lifecycle.OnEnabled; | ||
| import org.apache.nifi.components.AllowableValue; | ||
| import org.apache.nifi.components.PropertyDescriptor; | ||
| import org.apache.nifi.components.ValidationContext; | ||
| import org.apache.nifi.components.ValidationResult; | ||
| import org.apache.nifi.components.Validator; | ||
| import org.apache.nifi.context.PropertyContext; | ||
| import org.apache.nifi.controller.ConfigurationContext; | ||
| import org.apache.nifi.expression.ExpressionLanguageScope; | ||
| import org.apache.nifi.logging.ComponentLog; | ||
| import org.apache.nifi.processor.util.StandardValidators; | ||
| import org.apache.nifi.schema.access.SchemaAccessStrategy; | ||
| import org.apache.nifi.schema.access.SchemaNotFoundException; | ||
| import org.apache.nifi.schema.inference.SchemaInferenceUtil; | ||
| import org.apache.nifi.schemaregistry.services.SchemaRegistry; | ||
| import org.apache.nifi.serialization.MalformedRecordException; | ||
| import org.apache.nifi.serialization.RecordReader; | ||
| import org.apache.nifi.serialization.RecordReaderFactory; | ||
| import org.apache.nifi.serialization.SchemaRegistryService; | ||
| import org.apache.nifi.serialization.record.RecordSchema; | ||
|
|
||
| import javax.validation.Validation; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.Locale; | ||
| import java.util.Map; | ||
| import java.util.Set; | ||
| import java.util.stream.Collectors; | ||
|
|
||
| import static org.apache.nifi.schema.access.SchemaAccessUtils.SCHEMA_ACCESS_STRATEGY; | ||
| import static org.apache.nifi.schema.inference.SchemaInferenceUtil.SCHEMA_CACHE; | ||
|
|
||
| @Tags({"cef", "record", "reader", "parser"}) | ||
| @CapabilityDescription("Parses CEF (Common Event Format) events, returning each row as a record. " | ||
| + "This reader allows for inferring a schema based on the first event in the FlowFile or providing an explicit schema for interpreting the values.") | ||
| public final class CEFReader extends SchemaRegistryService implements RecordReaderFactory { | ||
|
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| static final AllowableValue HEADERS_ONLY = new AllowableValue("headers-only", "Headers only", "Includes only CEF header fields into the inferred schema."); | ||
| static final AllowableValue HEADERS_AND_EXTENSIONS = new AllowableValue("headers-and-extensions", "Headers and extensions", | ||
| "Includes the CEF header and extension fields to the schema, but not the custom extensions."); | ||
| static final AllowableValue CUSTOM_EXTENSIONS_AS_STRINGS = new AllowableValue("custom-extensions-as-string", "With custom extensions as strings", | ||
| "Includes all fields into the inferred schema, involving custom extension fields as string values."); | ||
| static final AllowableValue CUSTOM_EXTENSIONS_INFERRED = new AllowableValue("custom-extensions-inferred", "With custom extensions inferred", | ||
| "Includes all fields into the inferred schema, involving custom extension fields with inferred data types. " + | ||
| "The inference works based on the values in the FlowFile. In some scenarios this might result unsatisfiable behaviour. " + | ||
| "In these cases it is suggested to use \"" + CUSTOM_EXTENSIONS_AS_STRINGS.getDisplayName() + "\" Inference Strategy or predefined schema."); | ||
|
|
||
| static final PropertyDescriptor INFERENCE_STRATEGY = new PropertyDescriptor.Builder() | ||
| .name("inference-strategy") | ||
| .displayName("Inference Strategy") | ||
| .description("Defines the set of fields should be included in the schema and the way the fields are being interpreted.") | ||
| .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) | ||
| .required(true) | ||
| .allowableValues(HEADERS_ONLY, HEADERS_AND_EXTENSIONS, CUSTOM_EXTENSIONS_AS_STRINGS, CUSTOM_EXTENSIONS_INFERRED) | ||
| .defaultValue(CUSTOM_EXTENSIONS_INFERRED.getValue()) | ||
| .dependsOn(SCHEMA_ACCESS_STRATEGY, SchemaInferenceUtil.INFER_SCHEMA) | ||
| .build(); | ||
|
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| static final PropertyDescriptor RAW_FIELD = new PropertyDescriptor.Builder() | ||
| .name("raw-message-field") | ||
| .displayName("Raw Message Field") | ||
| .description("If set the raw message will be added to the record using the property value as field name. This is not the same as the \"rawEvent\" extension field!") | ||
| .addValidator(new ValidateRawField()) | ||
| .required(false) | ||
| .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) | ||
| .build(); | ||
|
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| static final PropertyDescriptor INVALID_FIELD = new PropertyDescriptor.Builder() | ||
| .name("invalid-message-field") | ||
| .displayName("Invalid Field") | ||
| .description("Used when a line in the FlowFile cannot be parsed by the CEF parser. " + | ||
| "If set, instead of failing to process the FlowFile, a record is being added with one field. " + | ||
| "This record contains one field with the name specified by the property and the raw message as value.") | ||
| .addValidator(new ValidateRawField()) | ||
| .required(false) | ||
| .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) | ||
| .build(); | ||
|
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| static final PropertyDescriptor DATETIME_REPRESENTATION = new PropertyDescriptor.Builder() | ||
| .name("datetime-representation") | ||
| .displayName("DateTime Locale") | ||
| .description("The IETF BCP 47 representation of the Locale to be used when parsing date " + | ||
| "fields with long or short month names (e.g. may <en-US> vs. mai. <fr-FR>. The default" + | ||
| "value is generally safe. Only change if having issues parsing CEF messages") | ||
| .required(true) | ||
| .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) | ||
| .addValidator(new ValidateLocale()) | ||
| .defaultValue("en-US") | ||
| .build(); | ||
|
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| static final PropertyDescriptor ACCEPT_EMPTY_EXTENSIONS = new PropertyDescriptor.Builder() | ||
| .name("accept-empty-extensions") | ||
| .displayName("Accept empty extensions") | ||
| .description("If set to true, empty extensions will be accepted and will be associated to a null value.") | ||
| .addValidator(StandardValidators.BOOLEAN_VALIDATOR) | ||
| .required(true) | ||
| .defaultValue("false") | ||
| .allowableValues("true", "false") | ||
| .build(); | ||
|
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| private final javax.validation.Validator validator = Validation.byProvider(ApacheValidationProvider.class).configure().buildValidatorFactory().getValidator(); | ||
| private final CEFParser parser = new CEFParser(validator); | ||
|
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| private volatile String rawMessageField; | ||
| private volatile String invalidField; | ||
| private volatile Locale parcefoneLocale; | ||
| private volatile boolean includeCustomExtensions; | ||
| private volatile boolean acceptEmptyExtensions; | ||
|
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| @Override | ||
| protected List<PropertyDescriptor> getSupportedPropertyDescriptors() { | ||
| final List<PropertyDescriptor> properties = new ArrayList<>(super.getSupportedPropertyDescriptors()); | ||
| properties.add(RAW_FIELD); | ||
| properties.add(INVALID_FIELD); | ||
| properties.add(DATETIME_REPRESENTATION); | ||
| properties.add(INFERENCE_STRATEGY); | ||
|
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| properties.add(new PropertyDescriptor.Builder() | ||
| .fromPropertyDescriptor(SCHEMA_CACHE) | ||
| .dependsOn(SCHEMA_ACCESS_STRATEGY, SchemaInferenceUtil.INFER_SCHEMA) | ||
| .build()); | ||
|
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| properties.add(ACCEPT_EMPTY_EXTENSIONS); | ||
| return properties; | ||
| } | ||
|
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| @Override | ||
| protected List<AllowableValue> getSchemaAccessStrategyValues() { | ||
| final List<AllowableValue> allowableValues = new ArrayList<>(super.getSchemaAccessStrategyValues()); | ||
| allowableValues.add(SchemaInferenceUtil.INFER_SCHEMA); | ||
| return allowableValues; | ||
| } | ||
|
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| @Override | ||
| protected AllowableValue getDefaultSchemaAccessStrategy() { | ||
| return SchemaInferenceUtil.INFER_SCHEMA; | ||
| } | ||
|
|
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| @Override | ||
| protected SchemaAccessStrategy getSchemaAccessStrategy(final String strategy, final SchemaRegistry schemaRegistry, final PropertyContext context) { | ||
| if (strategy.equals(SchemaInferenceUtil.INFER_SCHEMA.getValue())) { | ||
| final String inferenceStrategy = context.getProperty(INFERENCE_STRATEGY).getValue(); | ||
| final CEFSchemaInferenceBuilder builder = new CEFSchemaInferenceBuilder(); | ||
|
|
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| if (inferenceStrategy.equals(HEADERS_AND_EXTENSIONS.getValue())) { | ||
| builder.withExtensions(); | ||
| } else if (inferenceStrategy.equals(CUSTOM_EXTENSIONS_AS_STRINGS.getValue())) { | ||
| builder.withCustomExtensions(CEFCustomExtensionTypeResolver.STRING_RESOLVER); | ||
| } else if (inferenceStrategy.equals(CUSTOM_EXTENSIONS_INFERRED.getValue())) { | ||
| builder.withCustomExtensions(CEFCustomExtensionTypeResolver.SIMPLE_RESOLVER); | ||
| } | ||
|
|
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| if (rawMessageField != null) { | ||
| builder.withRawMessage(rawMessageField); | ||
| } | ||
|
|
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| if (invalidField != null) { | ||
| builder.withInvalidField(invalidField); | ||
| } | ||
|
|
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| final boolean failFast = invalidField == null || invalidField.isEmpty(); | ||
| final CEFSchemaInference inference = builder.build(); | ||
| return SchemaInferenceUtil.getSchemaAccessStrategy( | ||
| strategy, | ||
| context, | ||
| getLogger(), | ||
| (variables, in) -> new CEFRecordSource(in, parser, parcefoneLocale, acceptEmptyExtensions, failFast), | ||
| () -> inference, | ||
| () -> super.getSchemaAccessStrategy(strategy, schemaRegistry, context)); | ||
| } | ||
|
|
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| return super.getSchemaAccessStrategy(strategy, schemaRegistry, context); | ||
| } | ||
|
|
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| @OnEnabled | ||
| public void onEnabled(final ConfigurationContext context) { | ||
| rawMessageField = context.getProperty(RAW_FIELD).evaluateAttributeExpressions().getValue(); | ||
| invalidField = context.getProperty(INVALID_FIELD).evaluateAttributeExpressions().getValue(); | ||
| parcefoneLocale = Locale.forLanguageTag(context.getProperty(DATETIME_REPRESENTATION).evaluateAttributeExpressions().getValue()); | ||
|
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| final String inferenceStrategy = context.getProperty(INFERENCE_STRATEGY).getValue(); | ||
| final boolean inferenceNeedsCustomExtensions = !inferenceStrategy.equals(HEADERS_ONLY.getValue()) && !inferenceStrategy.equals(HEADERS_AND_EXTENSIONS.getValue()); | ||
| final boolean isInferSchema = context.getProperty(SCHEMA_ACCESS_STRATEGY).getValue().equals(SchemaInferenceUtil.INFER_SCHEMA.getValue()); | ||
|
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| includeCustomExtensions = !isInferSchema || inferenceNeedsCustomExtensions; | ||
| acceptEmptyExtensions = context.getProperty(ACCEPT_EMPTY_EXTENSIONS).asBoolean(); | ||
| } | ||
|
|
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| @Override | ||
| public RecordReader createRecordReader( | ||
| final Map<String, String> variables, final InputStream in, final long inputLength, final ComponentLog logger | ||
| ) throws MalformedRecordException, IOException, SchemaNotFoundException { | ||
| final RecordSchema schema = getSchema(variables, in, null); | ||
| return new CEFRecordReader(in, schema, parser, logger, parcefoneLocale, rawMessageField, invalidField, includeCustomExtensions, acceptEmptyExtensions); | ||
| } | ||
|
|
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| private static class ValidateRawField implements Validator { | ||
| private final Set<String> headerFields = CEFSchemaUtil.getHeaderFields().stream().map(r -> r.getFieldName()).collect(Collectors.toSet()); | ||
| private final Set<String> extensionFields = CEFSchemaUtil.getExtensionTypeMapping().keySet().stream().flatMap(fields -> fields.stream()).collect(Collectors.toSet()); | ||
|
|
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| @Override | ||
| public ValidationResult validate(final String subject, final String input, final ValidationContext context) { | ||
| if (headerFields.contains(input)) { | ||
| return new ValidationResult.Builder().subject(subject).input(input).valid(false) | ||
| .explanation(input + " is one of the CEF header fields.").build(); | ||
| } | ||
|
|
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| if (extensionFields.contains(input)) { | ||
| return new ValidationResult.Builder().subject(subject).input(input).valid(false) | ||
| .explanation(input + " is one of the CEF extension fields.").build(); | ||
| } | ||
|
|
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| // Field names are not part of the specified CEF field names are accepted, just like null or empty value | ||
| return new ValidationResult.Builder().subject(subject).input(input).valid(true).build(); | ||
| } | ||
| } | ||
| } |
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