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Сергей Крючков
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# SCHEMA Component
Компонент для валидации xml с помощью xsd, ранее загруженных в бд через soap(/schema-management)
Сделан на основе camel validator, с заменой загрузчика xsd и ResourceResolver'a(для подгрузки зависимых xsd)
https://camel.apache.org/components/latest/validator-component.html
Компонент работает в двух режимах:
- статический, когда небходимую схему указывают в самом маршруте через namespace, uud или name(версию можно указывать через параметры)
validatorWithDBStorage:namespace:http://www.entaxy.ru/registry-scheme-service/
validatorWithDBStorage:uuid:a7ff793b-d996-42a5-a62b-fb44a2143e98?version=3.0
validatorWithDBStorage:name:lama.xsd?version=3.0
- динамический, если не было указано ничего из выше перечисленного, то будет выбран этот режим.
когда сообщение парсится при поступлении и с помощью namespace загружается его xsd, если xsd была
не найдена или namespace не был указан будет ошибка

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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>schema</artifactId>
<groupId>ru.entaxy.esb.system.registry.schema</groupId>
<version>1.8.0</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>schema-component</artifactId>
<packaging>bundle</packaging>
<name>SYSTEM :: ENTAXY :: REGISTRY :: SCHEMA :: COMPONENT</name>
<description>SYSTEM :: ENTAXY :: REGISTRY :: SCHEMA :: COMPONENT</description>
<properties>
<bundle.osgi.export.service>org.apache.camel.spi.ComponentResolver;component=schema</bundle.osgi.export.service>
<bundle.osgi.import.pkg>
ru.entaxy.esb.system.common.osgi,
ru.entaxy.esb.system.common.osgi.impl,
javax.persistence;version="[2,3)",
*
</bundle.osgi.import.pkg>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-core</artifactId>
<version>${camel.version}</version>
</dependency>
<dependency>
<groupId>org.osgi</groupId>
<artifactId>org.osgi.core</artifactId>
<version>${osgi.version}</version>
</dependency>
<dependency>
<groupId>ru.entaxy.esb.system.registry.schema</groupId>
<artifactId>schema-api</artifactId>
<version>${project.version}</version>
</dependency>
<dependency>
<groupId>ru.entaxy.esb.system.commons</groupId>
<artifactId>system-commons</artifactId>
<version>${project.version}</version>
<scope>provided</scope>
</dependency>
</dependencies>
</project>

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system/registry/schema/schema-component/src/main/java/ru/entaxy/esb/system/registry/schema/component/ValidatingProcessor.java Normal file
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/*-
* ~~~~~~licensing~~~~~~
* schema-component
* ==========
* Copyright (C) 2020 - 2021 EmDev LLC
* ==========
* Licensed 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.
* ~~~~~~/licensing~~~~~~
*/
package ru.entaxy.esb.system.registry.schema.component;
import org.apache.camel.*;
import org.apache.camel.converter.jaxp.XmlConverter;
import org.apache.camel.support.AsyncProcessorHelper;
import org.apache.camel.support.processor.validation.DefaultValidationErrorHandler;
import org.apache.camel.support.processor.validation.SchemaValidationException;
import org.apache.camel.support.processor.validation.ValidatorErrorHandler;
import org.apache.camel.util.IOHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.ls.LSResourceResolver;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import ru.entaxy.esb.system.registry.schema.component.exception.SchemaNotFoundException;
import ru.entaxy.esb.system.registry.schema.component.util.SchemaReaderFromDB;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.dom.DOMResult;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.sax.SAXResult;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.stax.StAXSource;
import javax.xml.transform.stream.StreamSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import javax.xml.validation.Validator;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
/**
* A processor which validates the XML version of the inbound message body
* against some schema either in XSD or RelaxNG
*/
public class ValidatingProcessor implements AsyncProcessor {
private static final Logger LOG = LoggerFactory.getLogger(ValidatingProcessor.class);
private final SchemaReaderFromDB schemaReaderFromDB;
private ValidatorErrorHandler errorHandler = new DefaultValidationErrorHandler();
private final XmlConverter converter = new XmlConverter();
private boolean useDom;
private boolean useSharedSchema = true;
private boolean failOnNullBody = true;
private boolean failOnNullHeader = true;
private String headerName;
private String uri;
private final Map<String, Schema> schemaMap = new HashMap<>();
public ValidatingProcessor() {
schemaReaderFromDB = new SchemaReaderFromDB();
}
public ValidatingProcessor(SchemaReaderFromDB schemaReaderFromDB, String uri) {
// schema reader can be a singelton per schema, therefore make reuse, see ValidatorEndpoint and ValidatorProducer
this.schemaReaderFromDB = schemaReaderFromDB;
this.uri = uri;
}
public void process(Exchange exchange) throws Exception {
AsyncProcessorHelper.process(this, exchange);
}
public boolean process(Exchange exchange, AsyncCallback callback) {
try {
doProcess(exchange);
} catch (Exception e) {
exchange.setException(e);
}
callback.done(true);
return true;
}
@Override
public CompletableFuture<Exchange> processAsync(Exchange exchange) {
return null;
}
protected void doProcess(Exchange exchange) throws Exception {
Schema schema = null;
Validator validator = null;
if (uri != null && !uri.isEmpty()) {
schema = getOrCreateSchema(schemaReaderFromDB.getSchemaResourceUri());
validator = getValidator(schema);
}
// the underlying input stream, which we need to close to avoid locking files or other resources
Source source = null;
InputStream is = null;
try {
Result result = null;
// only convert to input stream if really needed
if (isInputStreamNeeded(exchange)) {
is = getContentToValidate(exchange, InputStream.class);
if (is != null) {
source = getSource(exchange, is);
}
} else {
Object content = getContentToValidate(exchange);
if (content != null) {
source = getSource(exchange, content);
}
}
//CAMEL-7036 We don't need to set the result if the source is an instance of StreamSource
if (source instanceof DOMSource) {
result = new DOMResult();
} else if (source instanceof SAXSource) {
result = new SAXResult();
} else if (source instanceof StAXSource || source instanceof StreamSource) {
result = null;
}
if (source != null) {
if (validator == null) {
String namespace = "namespace:" + getNamespace(source);
schemaReaderFromDB.setSchemaResourceUri(namespace);
schema = getOrCreateSchema(namespace);
validator = getValidator(schema);
}
if (validator == null)
throw new SchemaNotFoundException("Schema not found for {" + schemaReaderFromDB.getSchemaResourceUri() + "}");
// create a new errorHandler and set it on the validator
// must be a local instance to avoid problems with concurrency (to be
// thread safe)
ValidatorErrorHandler handler = errorHandler.getClass().newInstance();
validator.setErrorHandler(handler);
try {
LOG.trace("Validating {}", source);
validator.validate(source, result);
handler.handleErrors(exchange, schema, result);
} catch (SAXParseException e) {
// can be thrown for non well formed XML
throw new SchemaValidationException(exchange, schema, Collections.singletonList(e),
Collections.emptyList(),
Collections.emptyList());
}
}
} finally {
IOHelper.close(is);
}
}
private String getNamespace(Source source) throws ParserConfigurationException, IOException, SAXException {
StreamSource domSource = (StreamSource) source;
domSource.getInputStream();
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setNamespaceAware(true);
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(domSource.getInputStream());
return document.getDocumentElement().getNamespaceURI();
}
private Schema getOrCreateSchema(String resourceUri) throws IOException, SAXException {
if (!schemaMap.containsKey(resourceUri) && resourceUri != null && !resourceUri.isEmpty()) {
schemaMap.put(resourceUri, createSchema());
}
return resourceUri == null ? null : schemaMap.get(resourceUri);
}
private Validator getValidator(Schema schema) {
return schema != null ? schema.newValidator() : null;
}
private Object getContentToValidate(Exchange exchange) {
if (shouldUseHeader()) {
return exchange.getIn().getHeader(headerName);
} else {
return exchange.getIn().getBody();
}
}
private <T> T getContentToValidate(Exchange exchange, Class<T> clazz) {
if (shouldUseHeader()) {
return exchange.getIn().getHeader(headerName, clazz);
} else {
return exchange.getIn().getBody(clazz);
}
}
private boolean shouldUseHeader() {
return headerName != null;
}
public void loadSchema() throws Exception {
schemaReaderFromDB.loadSchema();
}
// Properties
// -----------------------------------------------------------------------
public Schema getSchema() throws IOException, SAXException {
return schemaReaderFromDB.getSchema();
}
public void setSchema(Schema schema) {
schemaReaderFromDB.setSchema(schema);
}
public String getSchemaLanguage() {
return schemaReaderFromDB.getSchemaLanguage();
}
public void setSchemaLanguage(String schemaLanguage) {
schemaReaderFromDB.setSchemaLanguage(schemaLanguage);
}
public Source getSchemaSource() throws IOException {
return schemaReaderFromDB.getSchemaSource();
}
public void setSchemaSource(Source schemaSource) {
schemaReaderFromDB.setSchemaSource(schemaSource);
}
public URL getSchemaUrl() {
return schemaReaderFromDB.getSchemaUrl();
}
public void setSchemaUrl(URL schemaUrl) {
schemaReaderFromDB.setSchemaUrl(schemaUrl);
}
public File getSchemaFile() {
return schemaReaderFromDB.getSchemaFile();
}
public void setSchemaFile(File schemaFile) {
schemaReaderFromDB.setSchemaFile(schemaFile);
}
public byte[] getSchemaAsByteArray() {
return schemaReaderFromDB.getSchemaAsByteArray();
}
public void setSchemaAsByteArray(byte[] schemaAsByteArray) {
schemaReaderFromDB.setSchemaAsByteArray(schemaAsByteArray);
}
public SchemaFactory getSchemaFactory() {
return schemaReaderFromDB.getSchemaFactory();
}
public void setSchemaFactory(SchemaFactory schemaFactory) {
schemaReaderFromDB.setSchemaFactory(schemaFactory);
}
public ValidatorErrorHandler getErrorHandler() {
return errorHandler;
}
public void setErrorHandler(ValidatorErrorHandler errorHandler) {
this.errorHandler = errorHandler;
}
@Deprecated
public boolean isUseDom() {
return useDom;
}
/**
* Sets whether DOMSource and DOMResult should be used.
*
* @param useDom true to use DOM otherwise
*/
@Deprecated
public void setUseDom(boolean useDom) {
this.useDom = useDom;
}
public boolean isUseSharedSchema() {
return useSharedSchema;
}
public void setUseSharedSchema(boolean useSharedSchema) {
this.useSharedSchema = useSharedSchema;
}
public LSResourceResolver getResourceResolver() {
return schemaReaderFromDB.getResourceResolver();
}
public void setResourceResolver(LSResourceResolver resourceResolver) {
schemaReaderFromDB.setResourceResolver(resourceResolver);
}
public boolean isFailOnNullBody() {
return failOnNullBody;
}
public void setFailOnNullBody(boolean failOnNullBody) {
this.failOnNullBody = failOnNullBody;
}
public boolean isFailOnNullHeader() {
return failOnNullHeader;
}
public void setFailOnNullHeader(boolean failOnNullHeader) {
this.failOnNullHeader = failOnNullHeader;
}
public String getHeaderName() {
return headerName;
}
public void setHeaderName(String headerName) {
this.headerName = headerName;
}
// Implementation methods
// -----------------------------------------------------------------------
protected SchemaFactory createSchemaFactory() {
return schemaReaderFromDB.createSchemaFactory();
}
protected Source createSchemaSource() throws IOException {
return schemaReaderFromDB.createSchemaSource();
}
protected Schema createSchema() throws SAXException, IOException {
return schemaReaderFromDB.createSchema();
}
/**
* Checks whether we need an {@link InputStream} to access the message body or header.
* <p/>
* Depending on the content in the message body or header, we may not need to convert
* to {@link InputStream}.
*
* @param exchange the current exchange
* @return <tt>true</tt> to convert to {@link InputStream} beforehand converting to {@link Source} afterwards.
*/
protected boolean isInputStreamNeeded(Exchange exchange) {
Object content = getContentToValidate(exchange);
if (content == null) {
return false;
}
if (content instanceof InputStream) {
return true;
} else if (content instanceof Source) {
return false;
} else if (content instanceof String) {
return false;
} else if (content instanceof byte[]) {
return false;
} else //there is a direct and hopefully optimized converter to Source
if (content instanceof Node) {
return false;
} else return exchange.getContext().getTypeConverterRegistry().lookup(Source.class, content.getClass()) == null;
// yes an input stream is needed
}
/**
* Converts the inbound body or header to a {@link Source}, if it is <b>not</b> already a {@link Source}.
* <p/>
* This implementation will prefer to source in the following order:
* <ul>
* <li>DOM - DOM if explicit configured to use DOM</li>
* <li>SAX - SAX as 2nd choice</li>
* <li>Stream - Stream as 3rd choice</li>
* <li>DOM - DOM as 4th choice</li>
* </ul>
*/
protected Source getSource(Exchange exchange, Object content) {
if (isUseDom()) {
// force DOM
return exchange.getContext().getTypeConverter().tryConvertTo(DOMSource.class, exchange, content);
}
// body or header may already be a source
if (content instanceof Source) {
return (Source) content;
}
Source source = null;
if (content instanceof InputStream) {
return new StreamSource((InputStream) content);
}
if (content != null) {
TypeConverter tc = exchange.getContext().getTypeConverterRegistry().lookup(Source.class, content.getClass());
if (tc != null) {
source = tc.convertTo(Source.class, exchange, content);
}
}
if (source == null) {
// then try SAX
source = exchange.getContext().getTypeConverter().tryConvertTo(SAXSource.class, exchange, content);
}
if (source == null) {
// then try stream
source = exchange.getContext().getTypeConverter().tryConvertTo(StreamSource.class, exchange, content);
}
if (source == null) {
// and fallback to DOM
source = exchange.getContext().getTypeConverter().tryConvertTo(DOMSource.class, exchange, content);
}
if (source == null) {
if (isFailOnNullBody()) {
throw new ExpectedBodyTypeException(exchange, Source.class);
} else {
try {
source = converter.toDOMSource(converter.createDocument());
} catch (ParserConfigurationException e) {
throw new RuntimeTransformException(e);
}
}
}
return source;
}
}

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system/registry/schema/schema-component/src/main/java/ru/entaxy/esb/system/registry/schema/component/ValidatorWithDBStorageComponent.java Normal file
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/*-
* ~~~~~~licensing~~~~~~
* schema-component
* ==========
* Copyright (C) 2020 - 2021 EmDev LLC
* ==========
* Licensed 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.
* ~~~~~~/licensing~~~~~~
*/
package ru.entaxy.esb.system.registry.schema.component;
import org.apache.camel.Endpoint;
import org.apache.camel.support.DefaultComponent;
import java.util.Map;
public class ValidatorWithDBStorageComponent extends DefaultComponent {
@Override
protected Endpoint createEndpoint(String uri, String xsdScheme, Map<String, Object> parameters) throws Exception {
ValidatorWithDBStorageEndpoint endpoint = new ValidatorWithDBStorageEndpoint(uri, this);
endpoint.setUri(uri);
setProperties(endpoint, parameters);
return endpoint;
}
}

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system/registry/schema/schema-component/src/main/java/ru/entaxy/esb/system/registry/schema/component/ValidatorWithDBStorageEndpoint.java Normal file
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/*-
* ~~~~~~licensing~~~~~~
* schema-component
* ==========
* Copyright (C) 2020 - 2021 EmDev LLC
* ==========
* Licensed 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.
* ~~~~~~/licensing~~~~~~
*/
package ru.entaxy.esb.system.registry.schema.component;
import org.apache.camel.Component;
import org.apache.camel.Consumer;
import org.apache.camel.Processor;
import org.apache.camel.Producer;
import org.apache.camel.spi.Metadata;
import org.apache.camel.spi.UriEndpoint;
import org.apache.camel.spi.UriParam;
import org.apache.camel.spi.UriPath;
import org.apache.camel.support.DefaultEndpoint;
import org.osgi.framework.FrameworkUtil;
import org.w3c.dom.ls.LSResourceResolver;
import ru.entaxy.esb.system.common.osgi.OSGIUtils;
import ru.entaxy.esb.system.registry.schema.api.ResourceService;
import ru.entaxy.esb.system.registry.schema.component.util.SchemaReaderFromDB;
@UriEndpoint(
scheme = "validatorWithDBStorage",
title = "ValidatorWithDBStorage",
syntax = "validatorWithDBStorage:namespace",
label = "Custom validator component with loader resources from db",
producerOnly = true)
public class ValidatorWithDBStorageEndpoint extends DefaultEndpoint {
@UriPath(description = "URL to a local resource on the classpath, or a reference to lookup a bean in the Registry,"
+ " or a full URL to a remote resource or resource on the file system which contains the XSD to validate against.")
@Metadata(required = true)
private String uri;
@UriParam(description = "Version")
@Metadata(required = true)
private String version;
/**
* We need a one-to-one relation between endpoint and schema reader in order
* to be able to clear the cached schema in the schema reader. See method
*/
private final SchemaReaderFromDB schemaReaderFromDB;
private volatile boolean schemaReaderConfigured;
private ResourceService resourceService;
private LSResourceResolver resourceResolver;
public ValidatorWithDBStorageEndpoint(String uri, Component component) {
super(uri, component);
this.uri = uri.replace("validatorWithDBStorage://", "").replace("validatorWithDBStorage:", "").replace("validatorWithDBStorage", "");
schemaReaderFromDB = this.uri.isEmpty() ? new SchemaReaderFromDB() :
new SchemaReaderFromDB(getCamelContext(), this.uri, version);
}
public Producer createProducer() throws Exception {
if (!schemaReaderConfigured) {
if (resourceResolver != null) {
schemaReaderFromDB.setResourceResolver(getResourceResolver());
}
schemaReaderFromDB.setResourceService(getResourceService());
// force loading of schema at create time otherwise concurrent
// processing could cause thread safe issues for the
// javax.xml.validation.SchemaFactory
schemaReaderFromDB.loadSchema();
// configure only once
schemaReaderConfigured = true;
}
ValidatingProcessor validator = new ValidatingProcessor(schemaReaderFromDB, uri);
return new ValidatorWithDBStorageProducer(this, validator);
}
public Consumer createConsumer(Processor processor) throws Exception {
return null;
}
public boolean isSingleton() {
return true;
}
public String getUri() {
return uri;
}
public void setUri(String uri) {
this.uri = uri;
}
public ResourceService getResourceService() {
if (resourceService == null) {
resourceService = (ResourceService) OSGIUtils.getServiceReference(
FrameworkUtil.getBundle(ValidatorWithDBStorageEndpoint.class).getBundleContext(),
ResourceService.class.getName());
}
return resourceService;
}
private LSResourceResolver getResourceResolver() {
if (resourceResolver == null) {
resourceResolver = (LSResourceResolver) OSGIUtils.getServiceReference(
FrameworkUtil.getBundle(ValidatorWithDBStorageEndpoint.class).getBundleContext(),
LSResourceResolver.class.getName());
}
return resourceResolver;
}
public void setVersion(String version) {
this.version = version;
}
public String getVersion() {
return version;
}
}

63
system/registry/schema/schema-component/src/main/java/ru/entaxy/esb/system/registry/schema/component/ValidatorWithDBStorageProducer.java Normal file
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/*-
* ~~~~~~licensing~~~~~~
* schema-component
* ==========
* Copyright (C) 2020 - 2021 EmDev LLC
* ==========
* Licensed 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.
* ~~~~~~/licensing~~~~~~
*/
package ru.entaxy.esb.system.registry.schema.component;
import org.apache.camel.AsyncCallback;
import org.apache.camel.Endpoint;
import org.apache.camel.Exchange;
import org.apache.camel.support.DefaultAsyncProducer;
import org.apache.camel.support.service.ServiceHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ValidatorWithDBStorageProducer extends DefaultAsyncProducer {
private static final Logger LOG = LoggerFactory.getLogger(ValidatorWithDBStorageProducer.class);
private final ValidatingProcessor validatingProcessor;
public ValidatorWithDBStorageProducer(Endpoint endpoint, ValidatingProcessor validatingProcessor) {
super(endpoint);
this.validatingProcessor = validatingProcessor;
}
@Override
public boolean process(Exchange exchange, AsyncCallback callback) {
return validatingProcessor.process(exchange, callback);
}
@Override
protected void doStart() throws Exception {
super.doStart();
ServiceHelper.startService(validatingProcessor);
}
@Override
protected void doStop() throws Exception {
super.doStop();
ServiceHelper.stopService(validatingProcessor);
}
@Override
protected void doShutdown() throws Exception {
super.doStop();
ServiceHelper.stopAndShutdownService(validatingProcessor);
}
}

47
system/registry/schema/schema-component/src/main/java/ru/entaxy/esb/system/registry/schema/component/exception/SchemaNotFoundException.java Normal file
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/*-
* ~~~~~~licensing~~~~~~
* schema-component
* ==========
* Copyright (C) 2020 - 2021 EmDev LLC
* ==========
* Licensed 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.
* ~~~~~~/licensing~~~~~~
*/
package ru.entaxy.esb.system.registry.schema.component.exception;
public class SchemaNotFoundException extends Exception {
private static final long serialVersionUID = 948229285513408917L;
public SchemaNotFoundException() {
super();
}
public SchemaNotFoundException(String message, Throwable cause, boolean enableSuppression,
boolean writableStackTrace) {
super(message, cause, enableSuppression, writableStackTrace);
}
public SchemaNotFoundException(String message, Throwable cause) {
super(message, cause);
}
public SchemaNotFoundException(String message) {
super(message);
}
public SchemaNotFoundException(Throwable cause) {
super(cause);
}
}

221
system/registry/schema/schema-component/src/main/java/ru/entaxy/esb/system/registry/schema/component/util/SchemaReaderFromDB.java Normal file
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/*-
* ~~~~~~licensing~~~~~~
* schema-component
* ==========
* Copyright (C) 2020 - 2021 EmDev LLC
* ==========
* Licensed 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.
* ~~~~~~/licensing~~~~~~
*/
package ru.entaxy.esb.system.registry.schema.component.util;
import org.apache.camel.CamelContext;
import org.apache.camel.util.ObjectHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.ls.LSResourceResolver;
import org.xml.sax.SAXException;
import ru.entaxy.esb.system.registry.schema.api.ResourceService;
import ru.entaxy.esb.system.registry.schema.api.entity.Resource;
import javax.xml.XMLConstants;
import javax.xml.transform.Source;
import javax.xml.transform.stream.StreamSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.util.Optional;
public class SchemaReaderFromDB {
/**
* Key of the global option to switch either off or on the access to external DTDs in the XML Validator for StreamSources.
* Only effective, if not a custom schema factory is used.
*/
public static final String ACCESS_EXTERNAL_DTD = "CamelXmlValidatorAccessExternalDTD";
private static final Logger LOG = LoggerFactory.getLogger(SchemaReaderFromDB.class);
private String schemaLanguage = XMLConstants.W3C_XML_SCHEMA_NS_URI;
// must be volatile because is accessed from different threads see ValidatorEndpoint.clearCachedSchema
private volatile Schema schema;
private Source schemaSource;
// must be volatile because is accessed from different threads see ValidatorEndpoint.clearCachedSchema
private volatile SchemaFactory schemaFactory;
private URL schemaUrl;
private File schemaFile;
private byte[] schemaAsByteArray;
private String schemaResourceUri;
private String version;
private LSResourceResolver resourceResolver;
private ResourceService resourceService;
private final CamelContext camelContext;
public SchemaReaderFromDB() {
this.camelContext = null;
this.schemaResourceUri = null;
}
/**
* Specify a camel context and a schema resource URI in order to read the schema via the class resolver specified in the Camel context.
*/
public SchemaReaderFromDB(CamelContext camelContext, String schemaResourceUri, String version) {
ObjectHelper.notNull(camelContext, "camelContext");
ObjectHelper.notNull(schemaResourceUri, "schemaResourceUri");
this.camelContext = camelContext;
this.schemaResourceUri = schemaResourceUri;
this.version = version;
}
public void loadSchema() throws Exception {
// force loading of schema
schema = createSchema();
}
// Properties
// -----------------------------------------------------------------------
public Schema getSchema() throws IOException, SAXException {
if (schema == null) {
synchronized (this) {
if (schema == null) {
schema = createSchema();
}
}
}
return schema;
}
public void setSchema(Schema schema) {
this.schema = schema;
}
public String getSchemaLanguage() {
return schemaLanguage;
}
public void setSchemaLanguage(String schemaLanguage) {
this.schemaLanguage = schemaLanguage;
}
public Source getSchemaSource() throws IOException {
if (schemaSource == null) {
schemaSource = createSchemaSource();
}
return schemaSource;
}
public void setSchemaSource(Source schemaSource) {
this.schemaSource = schemaSource;
}
public URL getSchemaUrl() {
return schemaUrl;
}
public void setSchemaUrl(URL schemaUrl) {
this.schemaUrl = schemaUrl;
}
public File getSchemaFile() {
return schemaFile;
}
public void setSchemaFile(File schemaFile) {
this.schemaFile = schemaFile;
}
public byte[] getSchemaAsByteArray() {
return schemaAsByteArray;
}
public void setSchemaAsByteArray(byte[] schemaAsByteArray) {
this.schemaAsByteArray = schemaAsByteArray;
}
public SchemaFactory getSchemaFactory() {
if (schemaFactory == null) {
synchronized (this) {
if (schemaFactory == null) {
schemaFactory = createSchemaFactory();
}
}
}
return schemaFactory;
}
public void setSchemaFactory(SchemaFactory schemaFactory) {
this.schemaFactory = schemaFactory;
}
public void setResourceService(ResourceService resourceService) {
this.resourceService = resourceService;
}
public LSResourceResolver getResourceResolver() {
return resourceResolver;
}
public void setResourceResolver(LSResourceResolver resourceResolver) {
this.resourceResolver = resourceResolver;
}
public void setSchemaResourceUri(String schemaResourceUri) {
this.schemaResourceUri = schemaResourceUri;
}
public String getSchemaResourceUri() {
return schemaResourceUri;
}
public SchemaFactory createSchemaFactory() {
SchemaFactory factory = SchemaFactory.newInstance(schemaLanguage);
if (getResourceResolver() != null) {
factory.setResourceResolver(getResourceResolver());
}
if (camelContext == null || !Boolean.parseBoolean(camelContext.getGlobalOptions().get(ACCESS_EXTERNAL_DTD))) {
try {
LOG.debug("Configuring SchemaFactory to not allow access to external DTD/Schema");
factory.setProperty(XMLConstants.ACCESS_EXTERNAL_DTD, "");
} catch (SAXException e) {
LOG.warn(e.getMessage(), e);
}
}
return factory;
}
public Source createSchemaSource() throws IOException {
throw new IllegalArgumentException("You must specify either a schema, schemaFile, schemaSource, schemaUrl, or schemaUri property");
}
public Schema createSchema() throws SAXException, IOException {
SchemaFactory factory = getSchemaFactory();
Optional<Resource> resource = Optional.empty();
if (schemaResourceUri != null && schemaResourceUri.contains("namespace:")) {
resource = resourceService.getResourceByNamespace(schemaResourceUri.replace("namespace:", ""));
}
if (schemaResourceUri != null && schemaResourceUri.contains("uuid:")) {
resource = resourceService.getResourceByNamespace(schemaResourceUri.replace("uuid:", ""));
}
if (resource.isPresent())
return factory.newSchema(new StreamSource(new ByteArrayInputStream(resource.get().getResourceValue())));
return null;
}
}

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class=ValidatorWithDBStorageComponent

30
system/registry/schema/schema-component/src/main/resources/log4j2.properties Normal file
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###
# ~~~~~~licensing~~~~~~
# schema-component
# ==========
# Copyright (C) 2020 - 2021 EmDev LLC
# ==========
# Licensed 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.
# ~~~~~~/licensing~~~~~~
###
appender.file.type=File
appender.file.name=file
appender.file.fileName=target/camel-test.log
appender.file.layout.type=PatternLayout
appender.file.layout.pattern=%d %-5p %c{1} - %m %n
appender.out.type=Console
appender.out.name=out
appender.out.layout.type=PatternLayout
appender.out.layout.pattern=[%30.30t] %-30.30c{1} %-5p %m%n
rootLogger.level=INFO
rootLogger.appenderRef.out.ref=out