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com.yahoo.elide.modelconfig.DynamicConfigHelpers Maven / Gradle / Ivy
/*
* Copyright 2020, Yahoo Inc.
* Licensed under the Apache License, Version 2.0
* See LICENSE file in project root for terms.
*/
package com.yahoo.elide.modelconfig;
import com.yahoo.elide.modelconfig.model.ElideDBConfig;
import com.yahoo.elide.modelconfig.model.ElideNamespaceConfig;
import com.yahoo.elide.modelconfig.model.ElideSecurityConfig;
import com.yahoo.elide.modelconfig.model.ElideTableConfig;
import com.yahoo.elide.modelconfig.parser.handlebars.HandlebarsHydrator;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.MapperFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.json.JsonMapper;
import org.apache.commons.lang3.StringUtils;
import org.hjson.JsonValue;
import org.hjson.ParseException;
import lombok.extern.slf4j.Slf4j;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
@Slf4j
/**
* Util class for Dynamic config helper module.
*/
public class DynamicConfigHelpers {
/**
* format config file path.
* @param basePath : path to hjson config.
* @return formatted file path.
*/
public static String formatFilePath(String basePath) {
if (StringUtils.isNotBlank(basePath) && !basePath.endsWith("/")) {
basePath += "/";
}
return basePath;
}
/**
* converts variables hjson string to map of variables.
* @param config HJSON file content.
* @param schemaValidator JSON schema validator.
* @return Map of Variables
* @throws IOException If an I/O error or a processing error occurs.
*/
@SuppressWarnings("unchecked")
public static Map stringToVariablesPojo(String fileName, String config,
DynamicConfigSchemaValidator schemaValidator) throws IOException {
Map variables = new HashMap<>();
String jsonConfig = hjsonToJson(config);
try {
if (schemaValidator.verifySchema(Config.MODELVARIABLE, jsonConfig, fileName)) {
variables = getModelPojo(jsonConfig, Map.class);
}
} catch (IOException e) {
log.error("Error Validating Variable config : " + e.getMessage());
throw e;
}
return variables;
}
/**
* Generates ElideTableConfig Pojo from input String.
* @param content : input string
* @param variables : variables to resolve.
* @param schemaValidator JSON schema validator.
* @return ElideTableConfig Pojo
* @throws IOException If an I/O error or a processing error occurs.
*/
public static ElideTableConfig stringToElideTablePojo(String fileName, String content,
Map variables, DynamicConfigSchemaValidator schemaValidator) throws IOException {
ElideTableConfig table = new ElideTableConfig();
String jsonConfig = hjsonToJson(resolveVariables(content, variables));
try {
if (schemaValidator.verifySchema(Config.TABLE, jsonConfig, fileName)) {
table = getModelPojo(jsonConfig, ElideTableConfig.class);
}
} catch (IOException e) {
log.error("Error Validating Table config : " + e.getMessage());
throw e;
}
return table;
}
/**
* Generates ElideDBConfig Pojo from input String.
* @param content : input string
* @param variables : variables to resolve.
* @param schemaValidator JSON schema validator.
* @return ElideDBConfig Pojo
* @throws IOException If an I/O error or a processing error occurs.
*/
public static ElideDBConfig stringToElideDBConfigPojo(String fileName, String content,
Map variables, DynamicConfigSchemaValidator schemaValidator) throws IOException {
ElideDBConfig dbconfig = new ElideDBConfig();
String jsonConfig = hjsonToJson(resolveVariables(content, variables));
try {
if (schemaValidator.verifySchema(Config.SQLDBConfig, jsonConfig, fileName)) {
dbconfig = getModelPojo(jsonConfig, ElideDBConfig.class);
}
} catch (IOException e) {
log.error("Error Validating DB config : " + e.getMessage());
throw e;
}
return dbconfig;
}
/**
* Generates ElideNamespaceConfig Pojo from input String.
* @param content : input string
* @param variables : variables to resolve.
* @param schemaValidator JSON schema validator.
* @return ElideNamespaceConfig Pojo
* @throws IOException If an I/O error or a processing error occurs.
*/
public static ElideNamespaceConfig stringToElideNamespaceConfigPojo(String fileName, String content,
Map variables, DynamicConfigSchemaValidator schemaValidator) throws IOException {
ElideNamespaceConfig namespaceconfig = new ElideNamespaceConfig();
String jsonConfig = hjsonToJson(resolveVariables(content, variables));
try {
if (schemaValidator.verifySchema(Config.NAMESPACEConfig, jsonConfig, fileName)) {
namespaceconfig = getModelPojo(jsonConfig, ElideNamespaceConfig.class);
}
} catch (IOException e) {
log.error("Error Validating DB config : " + e.getMessage());
throw e;
}
return namespaceconfig;
}
/**
* Generates ElideSecurityConfig Pojo from input String.
* @param content : input string
* @param variables : variables to resolve.
* @param schemaValidator JSON schema validator.
* @return ElideSecurityConfig Pojo
* @throws IOException If an I/O error or a processing error occurs.
*/
public static ElideSecurityConfig stringToElideSecurityPojo(String fileName, String content,
Map variables, DynamicConfigSchemaValidator schemaValidator) throws IOException {
String jsonConfig = hjsonToJson(resolveVariables(content, variables));
try {
if (schemaValidator.verifySchema(Config.SECURITY, jsonConfig, fileName)) {
return getModelPojo(jsonConfig, ElideSecurityConfig.class);
}
} catch (IOException e) {
log.error("Error Validating Security config : " + e.getMessage());
throw e;
}
return null;
}
/**
* resolves variables in table and security config.
* @param jsonConfig of table or security
* @param variables map from config
* @return json string with resolved variables
* @throws IOException If an I/O error or a processing error occurs.
*/
public static String resolveVariables(String jsonConfig, Map variables) throws IOException {
HandlebarsHydrator hydrator = new HandlebarsHydrator();
return hydrator.hydrateConfigTemplate(jsonConfig, variables);
}
private static String hjsonToJson(String hjson) {
try {
return JsonValue.readHjson(hjson).toString();
} catch (ParseException e) {
throw new IllegalStateException("Invalid Hjson Syntax: " + e.getMessage());
}
}
private static class DynamicConfigObjectMapper {
private static final ObjectMapper INSTANCE;
static {
INSTANCE = JsonMapper.builder().enable(MapperFeature.ACCEPT_CASE_INSENSITIVE_ENUMS).build();
}
private static ObjectMapper getInstance() {
return INSTANCE;
}
}
private static T getModelPojo(String jsonConfig, final Class configPojo) throws JsonProcessingException {
return DynamicConfigObjectMapper.getInstance().readValue(jsonConfig, configPojo);
}
}
