/*
* 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 org.apache.jackrabbit.spi2dav;
import java.util.LinkedHashMap;
import java.util.Map;
import org.apache.jackrabbit.spi.ItemId;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* <code>IdURICache</code>...
*/
class IdURICache {
private static Logger log = LoggerFactory.getLogger(IdURICache.class);
/**
* @see <a href="https://issues.apache.org/jira/browse/JCR-3305">JCR-3305</a>: limit cache size
*/
private static final int CACHESIZE = 10000;
private final String workspaceUri;
private Map<ItemId, String> idToUriCache;
private Map<String, ItemId> uriToIdCache;
IdURICache(String workspaceUri) {
this.workspaceUri = workspaceUri;
idToUriCache = new LinkedHashMap<ItemId, String>(CACHESIZE, 1) {
@Override
protected boolean removeEldestEntry(Map.Entry<ItemId, String> eldest) {
return this.size() > CACHESIZE;
}
};
uriToIdCache = new LinkedHashMap<String, ItemId>(CACHESIZE, 1) {
@Override
protected boolean removeEldestEntry(Map.Entry<String, ItemId> eldest) {
return this.size() > CACHESIZE;
}
};
}
public ItemId getItemId(String uri) {
return uriToIdCache.get(getCleanUri(uri));
}
public String getUri(ItemId itemId) {
return idToUriCache.get(itemId);
}
public boolean containsUri(String uri) {
return uriToIdCache.containsKey(getCleanUri(uri));
}
public boolean containsItemId(ItemId itemId) {
return idToUriCache.containsKey(itemId);
}
public void add(String uri, ItemId itemId) {
if (!uri.startsWith(workspaceUri)) {
throw new IllegalArgumentException("Workspace mismatch: '" + uri + "' not under '" + workspaceUri + "'");
}
String cleanUri = getCleanUri(uri);
uriToIdCache.put(cleanUri, itemId);
idToUriCache.put(itemId, cleanUri);
log.debug("Added: ItemId = " + itemId + " URI = " + cleanUri);
}
public void remove(String uri) {
String cleanUri = getCleanUri(uri);
ItemId itemId = uriToIdCache.remove(cleanUri);
if (itemId != null) {
idToUriCache.remove(itemId);
}
log.debug("Removed: ItemId = " + itemId + " URI = " + cleanUri);
}
public void remove(ItemId itemId) {
String uri = idToUriCache.remove(itemId);
if (uri != null) {
uriToIdCache.remove(uri);
}
log.debug("Removed: ItemId = " + itemId + " URI = " + uri);
}
public void clear() {
idToUriCache.clear();
uriToIdCache.clear();
}
private static String getCleanUri(String uri) {
if (uri.endsWith("/")) {
return uri.substring(0, uri.length() - 1);
} else {
return uri;
}
}
}