start implementation of guava based CacheManager

scm-webapp/src/main/java/sonia/scm/cache/CacheConfiguration.java

@@ -0,0 +1,231 @@
+/**
+ * Copyright (c) 2010, Sebastian Sdorra All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer. 2. Redistributions in
+ * binary form must reproduce the above copyright notice, this list of
+ * conditions and the following disclaimer in the documentation and/or other
+ * materials provided with the distribution. 3. Neither the name of SCM-Manager;
+ * nor the names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://bitbucket.org/sdorra/scm-manager
+ *
+ */
+
+
+
+package sonia.scm.cache;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import javax.xml.bind.annotation.XmlAccessType;
+import javax.xml.bind.annotation.XmlAccessorType;
+import javax.xml.bind.annotation.XmlAttribute;
+import javax.xml.bind.annotation.XmlRootElement;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+@XmlRootElement(name = "cache")
+@XmlAccessorType(XmlAccessType.FIELD)
+public class CacheConfiguration
+{
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  public Integer getConcurrencyLevel()
+  {
+    return concurrencyLevel;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  public CopyStrategy getCopyStrategy()
+  {
+    return copyStrategy;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  public Long getExpireAfterAccess()
+  {
+    return expireAfterAccess;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  public Long getExpireAfterWrite()
+  {
+    return expireAfterWrite;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  public Integer getInitialCapacity()
+  {
+    return initialCapacity;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  public Long getMaximumSize()
+  {
+    return maximumSize;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  public Long getMaximumWeight()
+  {
+    return maximumWeight;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  public String getName()
+  {
+    return name;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  public Boolean getRecordStats()
+  {
+    return recordStats;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  public Boolean getSoftValues()
+  {
+    return softValues;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  public Boolean getWeakKeys()
+  {
+    return weakKeys;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  public Boolean getWeakValues()
+  {
+    return weakValues;
+  }
+
+  //~--- fields ---------------------------------------------------------------
+
+  /** Field description */
+  @XmlAttribute
+  private Integer concurrencyLevel;
+
+  /** Field description */
+  @XmlAttribute
+  private CopyStrategy copyStrategy;
+
+  /** Field description */
+  @XmlAttribute
+  private Long expireAfterAccess;
+
+  /** Field description */
+  @XmlAttribute
+  private Long expireAfterWrite;
+
+  /** Field description */
+  @XmlAttribute
+  private Integer initialCapacity;
+
+  /** Field description */
+  @XmlAttribute
+  private Long maximumSize;
+
+  /** Field description */
+  @XmlAttribute
+  private Long maximumWeight;
+
+  /** Field description */
+  @XmlAttribute
+  private String name;
+
+  /** Field description */
+  @XmlAttribute
+  private Boolean recordStats;
+
+  /** Field description */
+  @XmlAttribute
+  private Boolean softValues;
+
+  /** Field description */
+  @XmlAttribute
+  private Boolean weakKeys;
+
+  /** Field description */
+  @XmlAttribute
+  private Boolean weakValues;
+}

scm-webapp/src/main/java/sonia/scm/cache/CacheException.java

@@ -0,0 +1,85 @@
+/**
+ * Copyright (c) 2010, Sebastian Sdorra All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer. 2. Redistributions in
+ * binary form must reproduce the above copyright notice, this list of
+ * conditions and the following disclaimer in the documentation and/or other
+ * materials provided with the distribution. 3. Neither the name of SCM-Manager;
+ * nor the names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://bitbucket.org/sdorra/scm-manager
+ *
+ */
+
+
+
+package sonia.scm.cache;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+public class CacheException extends RuntimeException
+{
+
+  /** Field description */
+  private static final long serialVersionUID = -1108209749696572319L;
+
+  //~--- constructors ---------------------------------------------------------
+
+  /**
+   * Constructs ...
+   *
+   */
+  public CacheException() {}
+
+  /**
+   * Constructs ...
+   *
+   *
+   * @param message
+   */
+  public CacheException(String message)
+  {
+    super(message);
+  }
+
+  /**
+   * Constructs ...
+   *
+   *
+   * @param cause
+   */
+  public CacheException(Throwable cause)
+  {
+    super(cause);
+  }
+
+  /**
+   * Constructs ...
+   *
+   *
+   * @param message
+   * @param cause
+   */
+  public CacheException(String message, Throwable cause)
+  {
+    super(message, cause);
+  }
+}

scm-webapp/src/main/java/sonia/scm/cache/CacheManagerConfiguration.java

@@ -0,0 +1,83 @@
+/**
+ * Copyright (c) 2010, Sebastian Sdorra All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer. 2. Redistributions in
+ * binary form must reproduce the above copyright notice, this list of
+ * conditions and the following disclaimer in the documentation and/or other
+ * materials provided with the distribution. 3. Neither the name of SCM-Manager;
+ * nor the names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://bitbucket.org/sdorra/scm-manager
+ *
+ */
+
+
+
+package sonia.scm.cache;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.util.List;
+
+import javax.xml.bind.annotation.XmlAccessType;
+import javax.xml.bind.annotation.XmlAccessorType;
+import javax.xml.bind.annotation.XmlElement;
+import javax.xml.bind.annotation.XmlRootElement;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+@XmlRootElement(name = "caches")
+@XmlAccessorType(XmlAccessType.FIELD)
+public class CacheManagerConfiguration
+{
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  public List<CacheConfiguration> getCaches()
+  {
+    return caches;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  public CacheConfiguration getDefaultCache()
+  {
+    return defaultCache;
+  }
+
+  //~--- fields ---------------------------------------------------------------
+
+  /** Field description */
+  @XmlElement(name = "cache")
+  private List<CacheConfiguration> caches;
+
+  /** Field description */
+  @XmlElement(name = "cache")
+  private CacheConfiguration defaultCache;
+}

scm-webapp/src/main/java/sonia/scm/cache/CopyStrategy.java

@@ -0,0 +1,147 @@
+/**
+ * Copyright (c) 2010, Sebastian Sdorra All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer. 2. Redistributions in
+ * binary form must reproduce the above copyright notice, this list of
+ * conditions and the following disclaimer in the documentation and/or other
+ * materials provided with the distribution. 3. Neither the name of SCM-Manager;
+ * nor the names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://bitbucket.org/sdorra/scm-manager
+ *
+ */
+
+
+
+package sonia.scm.cache;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import sonia.scm.io.DeepCopy;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.io.IOException;
+
+import java.util.Locale;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+public enum CopyStrategy
+{
+
+  NONE(false, false), READ(true, false), WRITE(false, true),
+    READWRITE(true, true);
+
+  /**
+   * Constructs ...
+   *
+   *
+   * @param copyOnRead
+   * @param copyOnWrite
+   */
+  private CopyStrategy(boolean copyOnRead, boolean copyOnWrite)
+  {
+    this.copyOnRead = copyOnRead;
+    this.copyOnWrite = copyOnWrite;
+  }
+
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param value
+   *
+   * @return
+   */
+  public static CopyStrategy fromString(String value)
+  {
+    return valueOf(value.toUpperCase(Locale.ENGLISH).replace("-", ""));
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param object
+   * @param <T>
+   *
+   * @return
+   */
+  public <T> T copyOnRead(T object)
+  {
+    return copyOnRead
+      ? deepCopy(object)
+      : object;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param object
+   * @param <T>
+   *
+   * @return
+   */
+  public <T> T copyOnWrite(T object)
+  {
+    return copyOnWrite
+      ? deepCopy(object)
+      : object;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param object
+   * @param <T>
+   *
+   * @return
+   */
+  private <T> T deepCopy(T object)
+  {
+    T copy = null;
+
+    try
+    {
+      copy = DeepCopy.copy(object);
+    }
+    catch (IOException ex)
+    {
+      throw new CacheException(
+        "could not create a copy of ".concat(object.toString()), ex);
+    }
+
+    return copy;
+  }
+
+  //~--- fields ---------------------------------------------------------------
+
+  /** Field description */
+  private boolean copyOnRead;
+
+  /** Field description */
+  private boolean copyOnWrite;
+}

scm-webapp/src/main/java/sonia/scm/cache/GuavaCache.java

@@ -0,0 +1,280 @@
+/**
+ * Copyright (c) 2010, Sebastian Sdorra All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer. 2. Redistributions in
+ * binary form must reproduce the above copyright notice, this list of
+ * conditions and the following disclaimer in the documentation and/or other
+ * materials provided with the distribution. 3. Neither the name of SCM-Manager;
+ * nor the names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://bitbucket.org/sdorra/scm-manager
+ *
+ */
+
+
+
+package sonia.scm.cache;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import com.google.common.cache.CacheBuilder;
+import com.google.common.collect.Sets;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import sonia.scm.Filter;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.util.Set;
+import java.util.concurrent.TimeUnit;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ *
+ * @param <K>
+ * @param <V>
+ */
+public class GuavaCache<K, V> implements Cache<K, V>
+{
+
+  /**
+   * the logger for GuavaCache
+   */
+  private static final Logger logger =
+    LoggerFactory.getLogger(GuavaCache.class);
+
+  //~--- constructors ---------------------------------------------------------
+
+  private String name;
+  
+  /**
+   * Constructs ...
+   *
+   *
+   * @param configuration
+   */
+  public GuavaCache(CacheConfiguration configuration)
+  {
+    this.name = configuration.getName();
+    
+    if (configuration.getCopyStrategy() != null)
+    {
+      copyStrategy = configuration.getCopyStrategy();
+    }
+
+    CacheBuilder<Object, Object> builder = CacheBuilder.newBuilder();
+
+    if (configuration.getConcurrencyLevel() != null)
+    {
+      builder.concurrencyLevel(configuration.getConcurrencyLevel());
+    }
+
+    if (configuration.getExpireAfterAccess() != null)
+    {
+      builder.expireAfterAccess(configuration.getExpireAfterAccess(),
+        TimeUnit.MILLISECONDS);
+    }
+
+    if (configuration.getExpireAfterWrite() != null)
+    {
+      builder.expireAfterWrite(configuration.getExpireAfterWrite(),
+        TimeUnit.MILLISECONDS);
+    }
+
+    if (configuration.getInitialCapacity() != null)
+    {
+      builder.initialCapacity(configuration.getInitialCapacity());
+    }
+
+    if (configuration.getMaximumSize() != null)
+    {
+      builder.maximumSize(configuration.getMaximumSize());
+    }
+
+    if (configuration.getMaximumWeight() != null)
+    {
+      builder.maximumWeight(configuration.getMaximumWeight());
+    }
+
+    if (isEnabled(configuration.getRecordStats()))
+    {
+      builder.recordStats();
+    }
+
+    if (isEnabled(configuration.getSoftValues()))
+    {
+      builder.softValues();
+    }
+
+    if (isEnabled(configuration.getWeakKeys()))
+    {
+      builder.weakKeys();
+    }
+
+    if (isEnabled(configuration.getWeakValues()))
+    {
+      builder.weakKeys();
+    }
+
+    cache = builder.build();
+
+    if (logger.isTraceEnabled())
+    {
+      logger.trace("create new guava cache from builder: {}", builder);
+    }
+  }
+
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   */
+  @Override
+  public void clear()
+  {
+        if (logger.isDebugEnabled())
+    {
+      logger.debug("clear cache {}", name);
+    }
+    cache.invalidateAll();
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param key
+   *
+   * @return
+   */
+  @Override
+  public boolean contains(K key)
+  {
+    return cache.getIfPresent(key) != null;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param key
+   * @param value
+   */
+  @Override
+  public void put(K key, V value)
+  {
+    cache.put(key, copyStrategy.copyOnWrite(value));
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param key
+   *
+   * @return
+   */
+  @Override
+  public boolean remove(K key)
+  {
+    cache.invalidate(key);
+
+    return true;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param filter
+   *
+   * @return
+   */
+  @Override
+  public boolean removeAll(Filter<K> filter)
+  {
+    Set<K> keysToRemove = Sets.newHashSet();
+
+    for (K key : cache.asMap().keySet())
+    {
+      if (filter.accept(key))
+      {
+        keysToRemove.add(key);
+      }
+    }
+
+    boolean result = false;
+
+    if (!keysToRemove.isEmpty())
+    {
+      cache.invalidateAll(keysToRemove);
+      result = true;
+    }
+
+    return result;
+  }
+
+  //~--- get methods ----------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param key
+   *
+   * @return
+   */
+  @Override
+  public V get(K key)
+  {
+    V value = cache.getIfPresent(key);
+
+    if (value != null)
+    {
+      value = copyStrategy.copyOnRead(value);
+    }
+
+    return value;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param v
+   *
+   * @return
+   */
+  private boolean isEnabled(Boolean v)
+  {
+    return (v != null) && v;
+  }
+
+  //~--- fields ---------------------------------------------------------------
+
+  /** Field description */
+  private com.google.common.cache.Cache<K, V> cache;
+
+  /** Field description */
+  private CopyStrategy copyStrategy = CopyStrategy.NONE;
+}

scm-webapp/src/main/java/sonia/scm/cache/GuavaCacheManager.java

@@ -0,0 +1,122 @@
+/**
+ * Copyright (c) 2010, Sebastian Sdorra All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer. 2. Redistributions in
+ * binary form must reproduce the above copyright notice, this list of
+ * conditions and the following disclaimer in the documentation and/or other
+ * materials provided with the distribution. 3. Neither the name of SCM-Manager;
+ * nor the names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://bitbucket.org/sdorra/scm-manager
+ *
+ */
+
+
+
+package sonia.scm.cache;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import com.google.common.collect.Maps;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.io.IOException;
+
+import java.util.Map;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+public class GuavaCacheManager implements CacheManager
+{
+
+  /**
+   * the logger for GuavaCacheManager
+   */
+  private static final Logger logger =
+    LoggerFactory.getLogger(GuavaCacheManager.class);
+
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @throws IOException
+   */
+  @Override
+  public void close() throws IOException
+  {
+    logger.info("close guava cache manager");
+
+    for (Cache c : cacheMap.values())
+    {
+      c.clear();
+    }
+
+    cacheMap.clear();
+  }
+
+  //~--- get methods ----------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param key
+   * @param value
+   * @param name
+   * @param <K>
+   * @param <V>
+   *
+   * @return
+   */
+  @Override
+  public <K, V> GuavaCache<K, V> getCache(Class<K> key, Class<V> value,
+    String name)
+  {
+    logger.trace("try to retrieve cache {}", name);
+
+    GuavaCache<K, V> cache = cacheMap.get(name);
+
+    if (cache == null)
+    {
+      logger.debug(
+        "cache {} does not exists, creating a new instance from default configuration: {}",
+        name, defaultConfiguration);
+      cache = new GuavaCache<K, V>(defaultConfiguration);
+      cacheMap.put(name, cache);
+    }
+
+    return cache;
+  }
+
+  //~--- fields ---------------------------------------------------------------
+
+  /** Field description */
+  private Map<String, GuavaCache> cacheMap = Maps.newConcurrentMap();
+
+  /** Field description */
+  private CacheConfiguration defaultConfiguration;
+}