package br.com.caelum.vraptor.actioncache.events;
import java.io.IOException;
import javax.enterprise.context.RequestScoped;
import javax.enterprise.event.Observes;
import javax.inject.Inject;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import br.com.caelum.vraptor.actioncache.ActionCache;
import br.com.caelum.vraptor.actioncache.ActionCacheEntry;
import br.com.caelum.vraptor.actioncache.CacheKey;
import br.com.caelum.vraptor.actioncache.Cached;
import br.com.caelum.vraptor.actioncache.CachedMethodExecuted;
import br.com.caelum.vraptor.actioncache.CharArrayWriterResponse;
import br.com.caelum.vraptor.actioncache.ProxyTargetInstance;
import br.com.caelum.vraptor.actioncache.RequestHeaders;
import br.com.caelum.vraptor.actioncache.WriteResponse;
import br.com.caelum.vraptor.http.MutableResponse;
import br.com.caelum.vraptor.view.ResultException;
@RequestScoped
public class WriteCachedResponse {
private MutableResponse response;
private ActionCache actionCache;
private RequestHeaders requestHeaders;
private static final Logger logger = LoggerFactory.getLogger(WriteCachedResponse.class);
@Deprecated
public WriteCachedResponse() {
}
@Inject
public WriteCachedResponse(MutableResponse response,ActionCache actionCache,RequestHeaders requestHeaders) {
super();
this.response = response;
this.actionCache = actionCache;
this.requestHeaders = requestHeaders;
}
public void execute(@Observes @WriteResponse CachedMethodExecuted executed) {
try {
Cached cached = executed.getCached();
CharArrayWriterResponse charArrayResponse = ProxyTargetInstance.get(response);
ActionCacheEntry entry = actionCache.fetch(new CacheKey(cached,requestHeaders));
HttpServletResponse originalResponse = charArrayResponse.delegate();
entry.copyHeadersTo(originalResponse);
logger.debug("Using cached response for {}", cached.key());
originalResponse.getWriter().write(entry.getResult());
originalResponse.flushBuffer();
} catch (IOException e) {
throw new ResultException(e);
}
}
}