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Open HTML to PDF is a CSS 2.1 renderer written in Java. This artifact contains the core rendering and layout code.
package com.openhtmltopdf.extend.impl;
import java.util.Map;
import java.util.concurrent.Callable;
import java.util.concurrent.ConcurrentHashMap;
import java.util.logging.Level;
import com.openhtmltopdf.extend.FSCacheEx;
import com.openhtmltopdf.extend.FSCacheValue;
import com.openhtmltopdf.util.XRLog;
/**
* A simple default cache implementation, mainly for testing. For production you will probably want to wrap Guava's cache implementation
* or something similar. This implementation does not use synchronisation beyond using a ConcurrentHashMap internally.
* Specifically, the {@link #get(String, Callable)} may call the loader multiple times if called in close succession.
*/
public class FSDefaultCacheStore implements FSCacheEx {
private final Map _store = new ConcurrentHashMap();
@Override
public void put(String key, FSCacheValue value) {
XRLog.load(Level.INFO, "Putting key(" + key + ") in cache.");
_store.put(key, value);
}
@Override
public FSCacheValue get(String key, Callable loader) {
if (_store.containsKey(key)) {
return this.get(key);
}
FSCacheValue value;
try {
value = loader.call();
if (value != null) {
_store.put(key, value);
}
} catch (Exception e) {
XRLog.exception("Could not load cache value for key(" + key + ")", e);
value = null;
}
XRLog.load(Level.INFO, (value == null ? "Missed" : "Hit") + " key(" + key + ") from cache.");
return value;
}
@Override
public FSCacheValue get(String key) {
FSCacheValue value = _store.get(key);
XRLog.load(Level.INFO, (value == null ? "Missed" : "Hit") + " key(" + key + ") from cache.");
return value;
}
}