/*
* Copyright 2011 JBoss Inc
*
* 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 org.jbpm.formbuilder.server.file;
import java.io.IOException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
import javax.xml.bind.JAXBException;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.methods.ByteArrayRequestEntity;
import org.apache.commons.httpclient.methods.DeleteMethod;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;
import org.jbpm.formbuilder.server.GuvnorHelper;
import org.jbpm.formbuilder.server.xml.MetaDataDTO;
import org.jbpm.formbuilder.server.xml.PackageAssetDTO;
import org.jbpm.formbuilder.server.xml.PackageAssetsDTO;
import org.springframework.beans.factory.InitializingBean;
public class GuvnorFileService implements FileService, InitializingBean {
private GuvnorHelper helper;
private String baseUrl;
private String user;
private String password;
public GuvnorFileService() {
}
public String getBaseUrl() {
return baseUrl;
}
public void setBaseUrl(String baseUrl) {
this.baseUrl = baseUrl;
}
public String getUser() {
return user;
}
public void setUser(String user) {
this.user = user;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
@Override
public void afterPropertiesSet() throws Exception {
this.helper = new GuvnorHelper(baseUrl, user, password);
}
public void setHelper(GuvnorHelper helper) {
this.helper = helper;
}
public GuvnorHelper getHelper() {
return helper;
}
public String extractFileExtension(String fileName) {
int dotInd = fileName.lastIndexOf('.');
// if dot is in the first position, we are dealing with a hidden file rather than an extension
return (dotInd > 0 && dotInd < fileName.length()) ? fileName.substring(dotInd + 1) : null;
}
public String stripFileExtension(String fileName) {
int dotInd = fileName.lastIndexOf('.');
// if dot is in the first position, we are dealing with a hidden file rather than an extension
String assetName = (dotInd > 0) ? fileName.substring(0, dotInd) : fileName;
if (!assetName.endsWith("-upfile")) {
assetName += "-upfile";
}
return assetName;
}
@Override
public String storeFile(String packageName, String fileName, byte[] content) throws FileException {
try {
String assetName = stripFileExtension(fileName);
String assetExt = extractFileExtension(fileName);
deleteOlderVersion(packageName, fileName);
HttpClient client = helper.getHttpClient();
String createUrl = helper.getRestBaseUrl() +
URLEncoder.encode(packageName, GuvnorHelper.ENCODING) + "/assets/";
PostMethod create = helper.createPostMethod(createUrl);
try {
helper.setAuth(client, create);
create.addRequestHeader("Content-Type", "application/octet-stream");
create.addRequestHeader("Accept", "application/atom+xml");
create.addRequestHeader("Slug", assetName + '.' + assetExt);
create.setRequestEntity(new ByteArrayRequestEntity(content));
client.executeMethod(create);
} finally {
create.releaseConnection();
}
return (this.baseUrl + "/org.drools.guvnor.Guvnor/api/packages/" +
URLEncoder.encode(packageName, GuvnorHelper.ENCODING) + "/" +
URLEncoder.encode(assetName, GuvnorHelper.ENCODING) +
"." + assetExt);
} catch (Exception e) {
throw new FileException("Problem storing file", e);
}
}
private void deleteOlderVersion(String packageName, String fileName) throws FileException {
HttpClient client = helper.getHttpClient();
String assetName = stripFileExtension(fileName);
GetMethod check = null;
try {
String deleteUrl = helper.getRestBaseUrl() +
URLEncoder.encode(packageName, GuvnorHelper.ENCODING) + "/assets/" +
URLEncoder.encode(assetName, GuvnorHelper.ENCODING);
check = helper.createGetMethod(deleteUrl);
helper.setAuth(client, check);
check.addRequestHeader("Accept", "application/xml");
client.executeMethod(check);
if (check.getStatusCode() == 200) {
deleteFile(packageName, fileName);
}
} catch (IOException e) {
throw new FileException("Problem getting old version of asset " + fileName + " in package " + packageName, e);
} finally {
if (check != null) {
check.releaseConnection();
}
}
}
@Override
public void deleteFile(String packageName, String fileName) throws FileException {
HttpClient client = helper.getHttpClient();
String assetName = stripFileExtension(fileName);
//String assetType = extractFileExtension(fileName);
DeleteMethod deleteAsset = null;
try {
String deleteUrl = helper.getRestBaseUrl() +
URLEncoder.encode(packageName, GuvnorHelper.ENCODING) + "/assets/" +
URLEncoder.encode(assetName, GuvnorHelper.ENCODING);
deleteAsset = helper.createDeleteMethod(deleteUrl);
helper.setAuth(client, deleteAsset);
client.executeMethod(deleteAsset);
} catch (IOException e) {
throw new FileException("Problem deleting guvnor file", e);
} catch (Exception e) {
throw new FileException("Unexpected error", e);
} finally {
if (deleteAsset != null) {
deleteAsset.releaseConnection();
}
}
}
@Override
public List<String> loadFilesByType(String packageName, String fileType) throws FileException {
HttpClient client = helper.getHttpClient();
GetMethod load = null;
try {
String loadUrl = helper.getRestBaseUrl() +
URLEncoder.encode(packageName, GuvnorHelper.ENCODING) + "/assets/";
load = helper.createGetMethod(loadUrl);
load.addRequestHeader("Accept", "application/xml");
helper.setAuth(client, load);
client.executeMethod(load);
PackageAssetsDTO dto = helper.jaxbTransformation(PackageAssetsDTO.class,
load.getResponseBodyAsStream(),
PackageAssetsDTO.class, PackageAssetDTO.class, MetaDataDTO.class);
List<PackageAssetDTO> validAssets = new ArrayList<PackageAssetDTO>();
if (fileType != null && !"".equals(fileType)) {
for (PackageAssetDTO asset : dto.getAsset()) {
if (asset.getMetadata().getFormat().equals(fileType)) {
validAssets.add(asset);
}
}
} else {
validAssets.addAll(dto.getAsset());
}
List<String> retval = new ArrayList<String>();
for (PackageAssetDTO asset : validAssets) {
String refLink = asset.getRefLink();
String fileName = refLink.substring(refLink.lastIndexOf('/') + 1);
fileName += "." + asset.getMetadata().getFormat();
retval.add(helper.getApiSearchUrl(packageName) + fileName);
}
return retval;
} catch (IOException e) {
throw new FileException("Problem obtaining assets from guvnor", e);
} catch (JAXBException e) {
throw new FileException("Problem parsing assets from guvnor", e);
} catch (Exception e) {
throw new FileException("Unexpected error", e);
} finally {
load.releaseConnection();
}
}
@Override
public byte[] loadFile(String packageName, String fileName) throws FileException {
HttpClient client = helper.getHttpClient();
String assetName = stripFileExtension(fileName);
GetMethod get = null;
try {
String getUrl = helper.getRestBaseUrl() +
URLEncoder.encode(packageName, GuvnorHelper.ENCODING) + "/assets/" +
URLEncoder.encode(assetName, GuvnorHelper.ENCODING) + "/source";
get = helper.createGetMethod(getUrl);
helper.setAuth(client, get);
client.executeMethod(get);
return get.getResponseBody();
} catch (IOException e) {
throw new FileException("Problem reading file " + fileName, e);
} catch (Exception e) {
throw new FileException("Unexpected error reading file " + fileName, e);
} finally {
if (get != null) {
get.releaseConnection();
}
}
}
}