com.predic8.membrane.core.resolver.ResolverMap Maven / Gradle / Ivy
/* Copyright 2012-2013 predic8 GmbH, www.predic8.com
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. */
package com.predic8.membrane.core.resolver;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.net.URI;
import java.security.InvalidParameterException;
import java.util.List;
import com.predic8.membrane.annot.MCChildElement;
import com.predic8.membrane.annot.MCElement;
import com.predic8.membrane.core.Router;
import com.predic8.membrane.core.cloud.etcd.*;
import com.predic8.membrane.core.kubernetes.KubernetesSchemaResolver;
import com.predic8.membrane.core.kubernetes.client.KubernetesClientFactory;
import com.predic8.membrane.core.transport.http.HttpClientFactory;
import com.predic8.membrane.core.util.TimerManager;
import com.predic8.membrane.core.util.functionalInterfaces.ExceptionThrowingConsumer;
import org.w3c.dom.ls.LSResourceResolver;
import com.google.common.base.Objects;
import com.predic8.membrane.core.util.LSInputImpl;
import com.predic8.xml.util.ExternalResolver;
/**
* A ResolverMap consists of a list of {@link SchemaResolver}s.
*
* It is itself a {@link Resolver}: Requests to resolve a URL are delegated
* to the corresponding {@link SchemaResolver} child depending on the URL's
* schema.
*
* Note that this class is not thread-safe! The ResolverMap is setup during
* Membrane's single-threaded startup and is only used read-only thereafter.
*/
@MCElement(name="resolverMap")
public class ResolverMap implements Cloneable, Resolver {
private EtcdResolver etcdResolver;
public static String combine(String... locations) {
if (locations.length < 2)
throw new InvalidParameterException();
if (locations.length > 2) {
// lfold
String[] l = new String[locations.length-1];
System.arraycopy(locations, 0, l, 0, locations.length-1);
return combine(combine(l), locations[locations.length-1]);
}
String parent = locations[0];
String relativeChild = locations[1];
if (relativeChild.contains(":/") || relativeChild.contains(":\\") || parent == null || parent.length() == 0)
return relativeChild;
if (parent.startsWith("file://")) {
if (relativeChild.startsWith("\\") || relativeChild.startsWith("/"))
return "file://" + new File(relativeChild).getAbsolutePath();
//System.err.println(FileSchemaResolver.normalize(parent));
File parentFile = new File(FileSchemaResolver.normalize(parent));
//System.err.println(parentFile.getAbsolutePath());
if (!parent.endsWith("/") && !parent.endsWith("\\"))
parentFile = parentFile.getParentFile();
//System.err.println(parentFile.getAbsolutePath());
String res = "file://" + new File(parentFile, relativeChild).getAbsolutePath();
if (relativeChild.endsWith("/") || relativeChild.endsWith("\\"))
res += "/";
return res;
}
if (parent.contains(":/")) {
try {
return new URI(parent).resolve(relativeChild.replaceAll("\\\\", "/")).toString();
} catch (Exception e) {
throw new RuntimeException(e);
}
} else if (parent.startsWith("/")) {
try {
String uri = new URI("file:" + parent).resolve(relativeChild).toString();
if (uri.startsWith("file:"))
return uri.substring(5);
return uri;
} catch (Exception e) {
throw new RuntimeException(e);
}
} else {
File parentFile = new File(parent);
if (!parent.endsWith("/") && !parent.endsWith("\\"))
parentFile = parentFile.getParentFile();
return new File(parentFile, relativeChild).getAbsolutePath();
}
}
int count = 0;
private String[] schemas;
private SchemaResolver[] resolvers;
public ResolverMap() {
this(null, null, null);
}
public ResolverMap(TimerManager timerManager, HttpClientFactory httpClientFactory, KubernetesClientFactory kubernetesClientFactory) {
schemas = new String[10];
resolvers = new SchemaResolver[10];
// the default config
addSchemaResolver(new ClasspathSchemaResolver());
addSchemaResolver(new HTTPSchemaResolver(httpClientFactory));
addSchemaResolver(new KubernetesSchemaResolver(kubernetesClientFactory));
addSchemaResolver(new FileSchemaResolver());
}
private ResolverMap(ResolverMap other) {
count = other.count;
schemas = new String[other.schemas.length];
resolvers = new SchemaResolver[other.resolvers.length];
System.arraycopy(other.schemas, 0, schemas, 0, count);
System.arraycopy(other.resolvers, 0, resolvers, 0, count);
}
@Override
public ResolverMap clone() {
return new ResolverMap(this);
}
public void addSchemaResolver(SchemaResolver sr) {
for (String schema : sr.getSchemas())
addSchemaResolver(schema == null ? null : schema + ":", sr);
}
private void addSchemaResolver(String schema, SchemaResolver resolver) {
for (int i = 0; i < count; i++)
if (Objects.equal(schemas[i], schema)) {
// schema already known: replace resolver
resolvers[i] = resolver;
return;
}
// increase array size
if (++count > schemas.length) {
String[] schemas2 = new String[schemas.length * 2];
System.arraycopy(schemas, 0, schemas2, 0, schemas.length);
schemas = schemas2;
SchemaResolver[] resolvers2 = new SchemaResolver[resolvers.length * 2];
System.arraycopy(resolvers, 0, resolvers2, 0, resolvers.length);
resolvers = resolvers2;
}
// determine target index
int newIndex = count - 1;
if (newIndex > 0 && schemas[newIndex - 1] == null) {
// move 'null' resolver to last index
schemas[newIndex] = schemas[newIndex - 1];
resolvers[newIndex] = resolvers[newIndex - 1];
newIndex--;
}
// insert resolver
schemas[newIndex] = schema;
resolvers[newIndex] = resolver;
}
private SchemaResolver getSchemaResolver(String uri) {
for (int i = 0; i < count; i++) {
if (schemas[i] == null)
return resolvers[i];
if (uri.startsWith(schemas[i]))
return resolvers[i];
}
throw new RuntimeException("No SchemaResolver defined for " + uri);
}
public void addRuleResolver(Router r){
addSchemaResolver(new RuleResolver(r));
}
public long getTimestamp(String uri) throws FileNotFoundException {
return getSchemaResolver(uri).getTimestamp(uri);
}
public InputStream resolve(String uri) throws ResourceRetrievalException {
try {
return getSchemaResolver(uri).resolve(uri);
} catch (ResourceRetrievalException e) {
throw e;
}
}
@Override
public void observeChange(String uri, ExceptionThrowingConsumer consumer) throws ResourceRetrievalException {
try {
getSchemaResolver(uri).observeChange(uri,consumer);
} catch (ResourceRetrievalException e) {
throw e;
}
}
public List getChildren(String uri) throws FileNotFoundException {
return getSchemaResolver(uri).getChildren(uri);
}
public HTTPSchemaResolver getHTTPSchemaResolver() {
return (HTTPSchemaResolver) getSchemaResolver("http:");
}
public SchemaResolver getFileSchemaResolver() {
return getSchemaResolver("file:");
}
public LSResourceResolver toLSResourceResolver() {
return (type, namespaceURI, publicId, systemId, baseURI) -> {
if (systemId == null)
return null;
try {
if (!systemId.contains("://"))
systemId = new URI(baseURI).resolve(systemId).toString();
return new LSInputImpl(publicId, systemId, resolve(systemId));
} catch (Exception e) {
throw new RuntimeException(e);
}
};
}
public ExternalResolverConverter toExternalResolver() {
return new ExternalResolverConverter();
}
public EtcdResolver getEtcdResolver() {
return etcdResolver;
}
@MCChildElement(order = 0)
public void setEtcdResolver(EtcdResolver etcdResolver) {
this.etcdResolver = etcdResolver;
addSchemaResolver(etcdResolver);
}
public KubernetesSchemaResolver getKubernetesSchemaResolver() {
return (KubernetesSchemaResolver) getSchemaResolver("kubernetes:");
}
public class ExternalResolverConverter {
public ExternalResolver toExternalResolver() {
return new ExternalResolver() {
@Override
public InputStream resolveAsFile(String filename, String baseDir) {
try {
if(baseDir != null) {
return ResolverMap.this.resolve(combine(baseDir, filename));
}
return ResolverMap.this.resolve(filename);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
@Override
protected InputStream resolveViaHttp(Object url) {
try {
String url2 = (String) url;
int q = url2.indexOf('?');
if (q == -1)
url2 = url2.replaceAll("/[^/]+/\\.\\./", "/");
else
url2 = url2.substring(0, q).replaceAll("/[^/]+/\\.\\./", "/") + url2.substring(q);
return getSchemaResolver(url2).resolve(url2);
} catch (ResourceRetrievalException e) {
throw new RuntimeException(e);
}
}
};
}
}
}