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/*
* Copyright 2012-2016 MarkLogic Corporation
*
* 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.marklogic.client.example.cookbook;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import javax.xml.XMLConstants;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import org.w3c.dom.Document;
import com.marklogic.client.DatabaseClient;
import com.marklogic.client.DatabaseClientFactory;
import com.marklogic.client.DatabaseClientFactory.Authentication;
import com.marklogic.client.FailedRequestException;
import com.marklogic.client.ForbiddenUserException;
import com.marklogic.client.ResourceNotFoundException;
import com.marklogic.client.admin.ExtensionMetadata;
import com.marklogic.client.admin.MethodType;
import com.marklogic.client.admin.ResourceExtensionsManager;
import com.marklogic.client.admin.ResourceExtensionsManager.MethodParameters;
import com.marklogic.client.document.XMLDocumentManager;
import com.marklogic.client.example.cookbook.Util.ExampleProperties;
import com.marklogic.client.extensions.ResourceManager;
import com.marklogic.client.extensions.ResourceServices.ServiceResult;
import com.marklogic.client.extensions.ResourceServices.ServiceResultIterator;
import com.marklogic.client.io.DOMHandle;
import com.marklogic.client.io.InputStreamHandle;
import com.marklogic.client.io.StringHandle;
import com.marklogic.client.io.XMLStreamReaderHandle;
import com.marklogic.client.util.RequestParameters;
/**
* ResourceExtension installs an extension for managing spelling dictionary resources.
*/
public class ResourceExtension {
public static void main(String[] args)
throws IOException, ResourceNotFoundException, ForbiddenUserException, FailedRequestException {
run(Util.loadProperties());
}
// install and then use the resource extension
public static void run(ExampleProperties props)
throws IOException, ResourceNotFoundException, ForbiddenUserException, FailedRequestException {
System.out.println("example: "+ResourceExtension.class.getName());
installResourceExtension(props.host, props.port,
props.adminUser, props.adminPassword, props.authType);
useResource(props.host, props.port,
props.writerUser, props.writerPassword, props.authType);
tearDownExample(props.host, props.port,
props.adminUser, props.adminPassword, props.authType);
}
/**
* DictionaryManager provides an example of a class that implements
* a resource extension client, exposing a method for each service.
* Typically, this class would be a top-level class.
*/
static public class DictionaryManager extends ResourceManager {
static final public String NAME = "dictionary";
private XMLDocumentManager docMgr;
public DictionaryManager(DatabaseClient client) {
super();
// a Resource Manager must be initialized by a Database Client
client.init(NAME, this);
// the Dictionary Manager delegates some services to a document manager
docMgr = client.newXMLDocumentManager();
}
public void createDictionary(String uri, String[] words)
throws ResourceNotFoundException, ForbiddenUserException, FailedRequestException {
StringBuilder builder = new StringBuilder();
builder.append("\n");
builder.append("\n");
for (String word: words) {
builder.append("");
builder.append(word);
builder.append("\n");
}
builder.append("\n");
StringHandle writeHandle = new StringHandle();
writeHandle.set(builder.toString());
// delegate
docMgr.write(uri,writeHandle);
}
public Document[] checkDictionaries(String... uris) {
RequestParameters params = new RequestParameters();
params.add("service", "check-dictionary");
params.add("uris", uris);
// specify the mime type for each expected document returned
String[] mimetypes = new String[uris.length];
for (int i=0; i < uris.length; i++) {
mimetypes[i] = "application/xml";
}
// call the service
ServiceResultIterator resultItr = getServices().get(params, mimetypes);
// iterate over the results
List documents = new ArrayList();
DOMHandle readHandle = new DOMHandle();
while (resultItr.hasNext()) {
ServiceResult result = resultItr.next();
// get the result content
result.getContent(readHandle);
documents.add(readHandle.get());
}
// release the iterator resources
resultItr.close();
return documents.toArray(new Document[documents.size()]);
}
public boolean isCorrect(String word, String... uris) {
try {
RequestParameters params = new RequestParameters();
params.add("service", "is-correct");
params.add("word", word);
params.add("uris", uris);
XMLStreamReaderHandle readHandle = new XMLStreamReaderHandle();
// call the service
getServices().get(params, readHandle);
QName correctName = new QName(XMLConstants.DEFAULT_NS_PREFIX, "correct");
XMLStreamReader streamReader = readHandle.get();
while (streamReader.hasNext()) {
int current = streamReader.next();
if (current == XMLStreamReader.START_ELEMENT) {
if (correctName.equals(streamReader.getName())) {
return "true".equals(streamReader.getElementText());
}
}
}
return false;
} catch(XMLStreamException ex) {
throw new RuntimeException(ex);
}
}
public String[] suggest(String word, Integer maximum, Integer distanceThreshold, String... uris) {
try {
RequestParameters params = new RequestParameters();
params.add("service", "suggest-detailed");
params.add("word", word);
params.add("uris", uris);
if (maximum != null)
params.add("maximum", String.valueOf(maximum));
if (distanceThreshold != null)
params.add("distance-threshold", String.valueOf(distanceThreshold));
XMLStreamReaderHandle readHandle = new XMLStreamReaderHandle();
// call the service
getServices().get(params, readHandle);
XMLStreamReader streamReader = readHandle.get();
QName wordName = new QName("http://marklogic.com/xdmp/spell", "word");
ArrayList words = new ArrayList();
while (streamReader.hasNext()) {
int current = streamReader.next();
if (current == XMLStreamReader.START_ELEMENT) {
if (wordName.equals(streamReader.getName())) {
words.add(streamReader.getElementText());
}
}
}
return words.toArray(new String[words.size()]);
} catch(XMLStreamException ex) {
throw new RuntimeException(ex);
}
}
public void deleteDictionary(String uri)
throws ResourceNotFoundException, ForbiddenUserException, FailedRequestException {
// delegate
docMgr.delete(uri);
}
}
// install the resource extension on the server
public static void installResourceExtension(String host, int port, String user, String password, Authentication authType) throws IOException {
// create the client
DatabaseClient client = DatabaseClientFactory.newClient(host, port, user, password, authType);
// use either shortcut or strong typed IO
installResourceExtensionShortcut(client);
installResourceExtensionStrongTyped(client);
// release the client
client.release();
}
public static void installResourceExtensionShortcut(DatabaseClient client) throws IOException {
// create a manager for resource extensions
ResourceExtensionsManager resourceMgr = client.newServerConfigManager().newResourceExtensionsManager();
// specify metadata about the resource extension
ExtensionMetadata metadata = new ExtensionMetadata();
metadata.setTitle("Spelling Dictionary Resource Services");
metadata.setDescription("This plugin supports spelling dictionaries");
metadata.setProvider("MarkLogic");
metadata.setVersion("0.1");
// acquire the resource extension source code
InputStream sourceStream = Util.openStream(
"scripts"+File.separator+DictionaryManager.NAME+".xqy");
if (sourceStream == null)
throw new IOException("Could not read example resource extension");
// write the resource extension to the database
resourceMgr.writeServicesAs(DictionaryManager.NAME, sourceStream, metadata,
new MethodParameters(MethodType.GET));
System.out.println("(Shortcut) Installed the resource extension on the server");
}
public static void installResourceExtensionStrongTyped(DatabaseClient client) throws IOException {
// create a manager for resource extensions
ResourceExtensionsManager resourceMgr = client.newServerConfigManager().newResourceExtensionsManager();
// specify metadata about the resource extension
ExtensionMetadata metadata = new ExtensionMetadata();
metadata.setTitle("Spelling Dictionary Resource Services");
metadata.setDescription("This plugin supports spelling dictionaries");
metadata.setProvider("MarkLogic");
metadata.setVersion("0.1");
// acquire the resource extension source code
InputStream sourceStream = Util.openStream(
"scripts"+File.separator+DictionaryManager.NAME+".xqy");
if (sourceStream == null)
throw new IOException("Could not read example resource extension");
// create a handle on the extension source code
InputStreamHandle handle = new InputStreamHandle();
handle.set(sourceStream);
// write the resource extension to the database
resourceMgr.writeServices(DictionaryManager.NAME, handle, metadata,
new MethodParameters(MethodType.GET));
System.out.println("(Strong Typed) Installed the resource extension on the server");
}
// use the resource manager
public static void useResource(String host, int port, String user, String password, Authentication authType)
throws ResourceNotFoundException, ForbiddenUserException, FailedRequestException {
// create the client
DatabaseClient client = DatabaseClientFactory.newClient(host, port, user, password, authType);
// create the resource extension client
DictionaryManager dictionaryMgr = new DictionaryManager(client);
// specify the identifier for the dictionary
String uri = "/example/metasyn.xml";
// create the dictionary
String[] words = {
"foo", "bar", "baz", "qux", "quux", "wibble", "wobble", "wubble"
};
dictionaryMgr.createDictionary(uri, words);
System.out.println("Created a dictionary on the server at "+uri);
// check the validity of the dictionary
Document[] list = dictionaryMgr.checkDictionaries(uri);
if (list == null || list.length == 0)
System.out.println("Could not check the validity of the dictionary at "+uri);
else
System.out.println(
"Checked the validity of the dictionary at "+uri+": "+
!"invalid".equals(list[0].getDocumentElement().getNodeName())
);
// use a resource service to check the correctness of a word
String word = "biz";
if (!dictionaryMgr.isCorrect(word, uri)) {
System.out.println("Confirmed that '"+word+"' is not in the dictionary at "+uri);
// use a resource service to look up suggestions
String[] suggestions = dictionaryMgr.suggest(word, null, null, uri);
System.out.println("Nearest matches for '"+word+"' in the dictionary at "+uri);
for (String suggestion: suggestions) {
System.out.println(" "+suggestion);
}
}
// delete the dictionary
dictionaryMgr.deleteDictionary(uri);
// release the client
client.release();
}
// clean up by deleting the example resource extension
public static void tearDownExample(
String host, int port, String user, String password, Authentication authType) {
DatabaseClient client = DatabaseClientFactory.newClient(host, port, user, password, authType);
ResourceExtensionsManager resourceMgr = client.newServerConfigManager().newResourceExtensionsManager();
resourceMgr.deleteServices(DictionaryManager.NAME);
client.release();
}
}
