com.opensymphony.xwork2.util.fs.DefaultFileManagerFactory Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.opensymphony.xwork2.util.fs;
import com.opensymphony.xwork2.FileManager;
import com.opensymphony.xwork2.FileManagerFactory;
import com.opensymphony.xwork2.inject.Container;
import com.opensymphony.xwork2.inject.Inject;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.struts2.StrutsConstants;
import java.util.HashSet;
import java.util.Set;
/**
* Default implementation
*/
public class DefaultFileManagerFactory implements FileManagerFactory {
private static final Logger LOG = LogManager.getLogger(DefaultFileManagerFactory.class);
private boolean reloadingConfigs;
private FileManagerHolder fileManagerHolder;
private FileManager systemFileManager;
private Container container;
@Inject(value = "system")
public void setFileManager(FileManager fileManager) {
this.systemFileManager = fileManager;
}
@Inject
public void setContainer(Container container) {
this.container = container;
}
@Inject(value = StrutsConstants.STRUTS_CONFIGURATION_XML_RELOAD, required = false)
public void setReloadingConfigs(String reloadingConfigs) {
this.reloadingConfigs = Boolean.parseBoolean(reloadingConfigs);
}
public FileManager getFileManager() {
if (fileManagerHolder != null) {
return fileManagerHolder.getFileManager();
}
FileManager fileManager = lookupFileManager();
if (fileManager != null) {
LOG.debug("Using FileManager implementation [{}]", fileManager.getClass().getSimpleName());
fileManager.setReloadingConfigs(reloadingConfigs);
fileManagerHolder = new FileManagerHolder(fileManager);
return fileManager;
}
LOG.debug("Using default implementation of FileManager provided under name [system]: {}", systemFileManager.getClass().getSimpleName());
systemFileManager.setReloadingConfigs(reloadingConfigs);
fileManagerHolder = new FileManagerHolder(systemFileManager);
return systemFileManager;
}
private FileManager lookupFileManager() {
Set names = container.getInstanceNames(FileManager.class);
LOG.debug("Found following implementations of FileManager interface: {}", names);
Set internals = new HashSet<>();
Set users = new HashSet<>();
for (String fmName : names) {
FileManager fm = container.getInstance(FileManager.class, fmName);
if (fm.internal()) {
internals.add(fm);
} else {
users.add(fm);
}
}
for (FileManager fm : users) {
if (fm.support()) {
LOG.debug("Using FileManager implementation [{}]", fm.getClass().getSimpleName());
return fm;
}
}
LOG.debug("No user defined FileManager, looking up for internal implementations!");
for (FileManager fm : internals) {
if (fm.support()) {
return fm;
}
}
return null;
}
private static class FileManagerHolder {
private final FileManager fileManager;
public FileManagerHolder(FileManager fileManager) {
this.fileManager = fileManager;
}
public FileManager getFileManager() {
return fileManager;
}
}
}