org.infinispan.client.hotrod.RemoteCache Maven / Gradle / Ivy
package org.infinispan.client.hotrod;
import java.util.Collection;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import org.infinispan.commons.api.BasicCache;
import org.infinispan.commons.util.concurrent.NotifyingFuture;
/**
* Provides remote reference to a Hot Rod server/cluster. It implements {@link org.infinispan.Cache}, but given its
* nature (remote) some operations are not supported. All these unsupported operations are being overridden within this
* interface and documented as such.
*
* New operations: besides the operations inherited from {@link org.infinispan.Cache}, RemoteCache also adds new
* operations to optimize/reduce network traffic: e.g. versioned put operation.
*
* Concurrency: implementors of this interface will support multi-threaded access, similar to the way {@link
* org.infinispan.Cache} supports it.
*
* Return values: previously existing values for certain {@link java.util.Map} operations are not returned, null
* is returned instead. E.g. {@link java.util.Map#put(Object, Object)} returns the previous value associated to the
* supplied key. In case of RemoteCache, this returns null.
*
* Synthetic operations: aggregate operations are being implemented based on other Hot Rod operations. E.g. all
* the {@link java.util.Map#putAll(java.util.Map)} is implemented through multiple individual puts. This means that the
* these operations are not atomic and that they are costly, e.g. as the number of network round-trips is not one, but
* the size of the added map. All these synthetic operations are documented as such.
*
* changing default behavior through {@link org.infinispan.client.hotrod.Flag}s: it is possible to change the
* default cache behaviour by using flags on an per invocation basis. E.g.
*
* RemoteCache cache = getRemoteCache();
* Object oldValue = cache.withFlags(Flag.FORCE_RETURN_VALUE).put(aKey, aValue);
*
* In the previous example, using {@link org.infinispan.client.hotrod.Flag#FORCE_RETURN_VALUE} will make the client to
* also return previously existing value associated with aKey. If this flag would not be present, Infinispan
* would return (by default) null. This is in order to avoid fetching a possibly large object from the remote
* server, which might not be needed. The flags as set by the {@link org.infinispan.client.hotrod.RemoteCache#withFlags(Flag...)}
* operation only apply for the very next operation executed by the same thread on the RemoteCache.
*
* Eviction and expiration: Unlike local {@link
* org.infinispan.Cache} cache, which allows specifying time values with any granularity (as defined by {@link
* TimeUnit}), HotRod only supports seconds as time units. If a different time unit is used instead, HotRod will
* transparently convert it to seconds, using {@link java.util.concurrent.TimeUnit#toSeconds(long)} method. This might
* result in loss of precision for values specified as nanos or milliseconds.
Another fundamental difference is in
* the case of lifespan (naturally does NOT apply for max idle): If number of seconds is bigger than 30 days, this
* number of seconds is treated as UNIX time and so, represents the number of seconds since 1/1/1970.
*
* Note on default expiration values: Due to limitations on the first
* version of the protocol, it's not possible for clients to rely on default
* lifespan and maxIdle values set on the server. This is because the protocol
* does not support a way to tell the server that no expiration lifespan and/or
* maxIdle were provided and that default values should be used. This will be
* resolved in a future revision of the protocol. In the mean time, the
* workaround is to explicitly provide the desired expiry lifespan/maxIdle
* values in each remote cache operation.
*
* @author [email protected]
* @since 4.1
*/
public interface RemoteCache extends BasicCache {
/**
* Removes the given entry only if its version matches the supplied version. A typical use case looks like this:
*
* VersionedEntry ve = remoteCache.getVersioned(key);
* //some processing
* remoteCache.removeWithVersion(key, ve.getVersion();
*
* Lat call (removeWithVersion) will make sure that the entry will only be removed if it hasn't been changed in
* between.
*
* @return true if the entry has been removed
* @see VersionedValue
* @see #getVersioned(Object)
*/
boolean removeWithVersion(K key, long version);
/**
* @see #remove(Object, Object)
*/
NotifyingFuture removeWithVersionAsync(K key, long version);
/**
* Replaces the given value only if its version matches the supplied version.
* See {@link #removeWithVersion(Object, long)} for a sample usage of the
* version-based methods.
*
* @param version numeric version that should match the one in the server
* for the operation to succeed
* @return true if the value has been replaced
* @see #getVersioned(Object)
* @see VersionedValue
*/
boolean replaceWithVersion(K key, V newValue, long version);
/**
* A overloaded form of {@link #replaceWithVersion(Object, Object, long)}
* which takes in lifespan parameters.
*
* @param key key to use
* @param newValue new value to be associated with the key
* @param version numeric version that should match the one in the server
* for the operation to succeed
* @param lifespanSeconds lifespan of the entry
* @return true if the value was replaced
*/
boolean replaceWithVersion(K key, V newValue, long version, int lifespanSeconds);
/**
* A overloaded form of {@link #replaceWithVersion(Object, Object, long)}
* which takes in lifespan and maximum idle time parameters.
*
* @param key key to use
* @param newValue new value to be associated with the key
* @param version numeric version that should match the one in the server
* for the operation to succeed
* @param lifespanSeconds lifespan of the entry
* @param maxIdleTimeSeconds the maximum amount of time this key is allowed
* to be idle for before it is considered as expired
* @return true if the value was replaced
*/
boolean replaceWithVersion(K key, V newValue, long version, int lifespanSeconds, int maxIdleTimeSeconds);
/**
* @see #replaceWithVersion(Object, Object, long)
*/
NotifyingFuture replaceWithVersionAsync(K key, V newValue, long version);
/**
* @see #replaceWithVersion(Object, Object, long)
*/
NotifyingFuture replaceWithVersionAsync(K key, V newValue, long version, int lifespanSeconds);
/**
* @see #replaceWithVersion(Object, Object, long)
*/
NotifyingFuture replaceWithVersionAsync(K key, V newValue, long version, int lifespanSeconds, int maxIdleSeconds);
/**
* Returns the {@link VersionedValue} associated to the supplied key param, or null if it doesn't exist.
*/
VersionedValue getVersioned(K key);
/**
* Returns the {@link MetadataValue} associated to the supplied key param, or null if it doesn't exist.
*/
MetadataValue getWithMetadata(K key);
/**
* @throws UnsupportedOperationException
*/
@Override
int size();
/**
* @throws UnsupportedOperationException
*/
@Override
boolean isEmpty();
/**
* @throws UnsupportedOperationException
*/
@Override
boolean containsValue(Object value);
/**
* Returns all keys in the remote server. It'll invoke a command over the network each time this method is called.
* If the remote cache is a distributed cache, it will retrieve all of the keys from all nodes in the cluster.
* Please use with care for cache with large data set.
*/
@Override
Set keySet();
/**
* @throws UnsupportedOperationException
*/
@Override
Collection values();
/**
* @throws UnsupportedOperationException
*/
@Override
Set> entrySet();
/**
* Synthetic operation. The client iterates over the set of keys and calls put for each one of them. This results in
* operation not being atomic (if a failure happens after few puts it is not rolled back) and costly (for each key in
* the parameter map a remote call is performed).
*/
@Override
void putAll(Map map, long lifespan, TimeUnit unit);
/**
* Synthetic operation.
*
* @see #putAll(java.util.Map, long, java.util.concurrent.TimeUnit)
*/
@Override
void putAll(Map map, long lifespan, TimeUnit lifespanUnit, long maxIdleTime, TimeUnit maxIdleTimeUnit);
/**
* Synthetic operation.
*
* @see #putAll(java.util.Map, long, java.util.concurrent.TimeUnit)
*/
@Override
NotifyingFuture putAllAsync(Map data);
/**
* Synthetic operation.
*
* @see #putAll(java.util.Map, long, java.util.concurrent.TimeUnit)
*/
@Override
NotifyingFuture putAllAsync(Map data, long lifespan, TimeUnit unit);
/**
* Synthetic operation.
*
* @see #putAll(java.util.Map, long, java.util.concurrent.TimeUnit)
*/
@Override
NotifyingFuture putAllAsync(Map data, long lifespan, TimeUnit lifespanUnit, long maxIdle, TimeUnit maxIdleUnit);
/**
* Synthetic operation.
*
* @see #putAll(java.util.Map, long, java.util.concurrent.TimeUnit)
*/
@Override
void putAll(Map m);
ServerStatistics stats();
/**
* Applies one or more {@link Flag}s to the scope of a single invocation. See the {@link Flag} enumeration to for
* information on available flags.
*
* Sample usage:
*
* remoteCache.withFlags(Flag.FORCE_RETURN_VALUE).put("hello", "world");
*
* @param flags
* @return the current RemoteCache instance to continue running operations on.
*/
RemoteCache withFlags(Flag... flags);
/**
* Returns the {@link org.infinispan.client.hotrod.RemoteCacheManager} that created this cache.
*/
RemoteCacheManager getRemoteCacheManager();
/**
* Bulk get operations, returns all the entries within the remote cache.
*
* @return the returned values depend on the configuration of the back-end infinispan servers. Read this for more details. The
* returned Map is unmodifiable.
*/
Map getBulk();
/**
* Same as {@link #getBulk()}, but limits the returned set of values to the specified size. No ordering is guaranteed, and there is no
* guarantee that "size" elements are returned( e.g. if the number of elements in the back-end server is smaller that "size")
*/
Map getBulk(int size);
/**
* Returns the HotRod protocol version supported by this RemoteCache implementation
*/
String getProtocolVersion();
/**
* Add a client listener to receive events that happen in the remote cache.
* The listener object must be annotated with @ClientListener annotation.
*/
void addClientListener(Object listener);
/**
* Add a client listener to receive events that happen in the remote cache.
* The listener object must be annotated with @ClientListener annotation.
*/
void addClientListener(Object listener, Object[] filterFactoryParams, Object[] converterFactoryParams);
/**
* Remove a previously added client listener. If the listener was not added
* before, this operation is a no-op.
*/
void removeClientListener(Object listener);
/**
* Returns a set with all the listeners registered by this client for the
* given cache.
*/
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