Examples of ch.entwine.weblounge.common.request.CacheHandle

Package ch.entwine.weblounge.common.request

Examples of ch.entwine.weblounge.common.request.CacheHandle

ch.entwine.weblounge.common.request.CacheHandle
Identifies a cached object with a recheck and expiration time. Clients may locally cache objects and use them without checking with the object's original source until recheck time is reached. At that point, the client should check if the object has been modified. Once the expiration time has been reached, the object must be thrown away and reloaded from the original source.
Implementing classes must provide meaningful hashCode() and equals() methods. @see ch.entwine.weblounge.common.Times

   *      ch.entwine.weblounge.common.request.WebloungeResponse, long, long)
   */
  public CacheHandle startResponse(CacheTag[] uniqueTags,
      WebloungeRequest request, WebloungeResponse response,
      long expirationTime, long revalidationTime) {
    CacheHandle hdl = new TaggedCacheHandle(uniqueTags, expirationTime, revalidationTime);
    return startResponse(hdl, request, response);
  }

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    try {


      // Is the response ready to be cached?
      if (tx.isValid() && response.isValid() && response.getStatus() == HttpServletResponse.SC_OK) {
        logger.trace("Writing response for {} to the cache", response);
        CacheHandle cacheHdl = tx.getHandle();
        String encoding = cacheableResponse.getCharacterEncoding();
        CacheEntry entry = new CacheEntry(cacheHdl, tx.getContent(), encoding, tx.getHeaders());
        Element element = new Element(new CacheEntryKey(cacheHdl), entry);
        element.setTimeToLive((int) (cacheHdl.getCacheExpirationTime() / 1000));
        cache.put(element);


        // Write cache and content relevant headers
        writeCacheHeaders(response, entry, true);
        writeContentHeaders(response, entry);

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   * {@link ch.entwine.weblounge.cache.impl.CacheableHttpServletResponse#startTransaction(ch.entwine.weblounge.common.request.CacheHandle, java.lang.String, ch.entwine.weblounge.cache.StreamFilter)}
   * .
   */
  @Test
  public void testStartTransaction() {
    CacheHandle hdl = new CacheHandleImpl("/a/b/c", expirationTime, recheckTime);
    CacheTransaction tx = response.startTransaction(hdl, null);
    assertNotNull(tx);
    assertEquals(hdl, tx.getHandle());
  }

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  @Test
  public void testGetETag() throws Exception {
    String eTag = entry.getETag();
    assertNotNull(eTag);
    Thread.sleep(1000);
    CacheHandle newHandle = new TaggedCacheHandle(tags.getTags(), expirationTime, recheckTime);
    String newETag = new CacheEntry(newHandle, content.getBytes(), encoding, headers).getETag();
    assertFalse(eTag.equals(newETag));
  }

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      return false;
    if (cacheHandle != null)
      throw new IllegalStateException("The response is already being cached");


    // Is the response in the cache?
    CacheHandle hdl = cache.startResponse(tags, request.get(), this, expirationTime, revalidationTime);
    if (hdl == null)
      return true;


    // It's not, meaning we need to do the processing ourselves
    cacheHandle = new WeakReference<CacheHandle>(hdl);

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    if (modificationDate == null)
      return this.modificationDate;
    this.modificationDate = modificationDate.after(this.modificationDate) ? modificationDate : this.modificationDate;
    if (cacheHandle == null)
      return this.modificationDate;
    CacheHandle hdl = cacheHandle.get();
    if (hdl == null)
      return this.modificationDate;
    return hdl.setModificationDate(modificationDate);
  }

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   */
  @Override
  public Date getModificationDate() {
    if (cacheHandle == null)
      return modificationDate.getTime() > 0 ? modificationDate : new Date();
    CacheHandle hdl = cacheHandle.get();
    if (hdl == null)
      return modificationDate.getTime() > 0 ? modificationDate : new Date();
    return hdl.getModificationDate();
  }

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   * @see ch.entwine.weblounge.common.request.WebloungeResponse#setClientRevalidationTime(long)
   */
  public void setClientRevalidationTime(long revalidationTime) {
    if (cacheHandle == null)
      return;
    CacheHandle hdl = cacheHandle.get();
    if (hdl == null)
      return;
    hdl.setClientRevalidationTime(Math.min(revalidationTime, hdl.getClientRevalidationTime()));
  }

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   * @see ch.entwine.weblounge.common.request.WebloungeResponse#getClientRevalidationTime()
   */
  public long getClientRevalidationTime() {
    if (cacheHandle == null)
      return 0;
    CacheHandle hdl = cacheHandle.get();
    if (hdl == null)
      return 0;
    return hdl.getClientRevalidationTime();
  }

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   * @see ch.entwine.weblounge.common.request.WebloungeResponse#setCacheExpirationTime(long)
   */
  public void setCacheExpirationTime(long expirationTime) {
    if (cacheHandle == null)
      return;
    CacheHandle hdl = cacheHandle.get();
    if (hdl == null)
      return;
    hdl.setCacheExpirationTime(Math.min(expirationTime, hdl.getCacheExpirationTime()));


    // The recheck time can't be longer than the valid time
    setClientRevalidationTime(expirationTime);
  }

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Related Classes of ch.entwine.weblounge.common.request.CacheHandle

ch.entwine.weblounge.cache.impl.CacheableHttpServletResponseTest

ch.entwine.weblounge.cache.impl.CacheEntryTest

ch.entwine.weblounge.cache.impl.CacheServiceImpl

ch.entwine.weblounge.common.impl.request.WebloungeResponseImpl

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