/* * Licensed to the Apache Software Foundation (ASF) under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional information regarding * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the License. You may obtain a * copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package org.apache.geode.cache.client; import org.apache.geode.cache.CacheClosedException; import org.apache.geode.cache.Region; import org.apache.geode.cache.server.CacheServer; import org.apache.geode.distributed.DistributedSystem; import org.apache.geode.internal.GemFireVersion; import org.apache.geode.internal.cache.CacheConfig; import org.apache.geode.internal.cache.GemFireCacheImpl; import org.apache.geode.internal.i18n.LocalizedStrings; import org.apache.geode.pdx.PdxInstance; import org.apache.geode.pdx.PdxSerializer; import java.util.Properties; import static org.apache.geode.distributed.ConfigurationProperties.LOCATORS; import static org.apache.geode.distributed.ConfigurationProperties.MCAST_PORT; /** * Factory class used to create the singleton {@link ClientCache client cache} and connect to one or * more GemFire Cache Servers. If the application wants to connect to GemFire as a peer it should * use {@link org.apache.geode.cache.CacheFactory} instead. * <p> * Once the factory has been configured using its set* methods you produce a {@link ClientCache} by * calling the {@link #create} method. The * {@link org.apache.geode.distributed.ConfigurationProperties#CACHE_XML_FILE} property can be used * to specify a cache.xml file to initialize the cache with. The contents of this file must comply * with the <code>"doc-files/cache8_0.dtd"</code> file and the top level element must be a * <code>client-cache</code> element. * <p> * Client connections are managed through connection {@link Pool pools}. ClientCacheFactory creates * a single pool to use by default on the cache it creates. ClientCacheFactory can also be used to * configure the default connection pool using its <code>setPool*</code> and <code>addPool*</code> * methods. In most cases, the defaults used by this implementation will suffice. For the default * pool attributes see {@link PoolFactory}. If no pool is configured and a pool was not declared in * cache.xml or created using {@link PoolManager} then a default one will be created that connects * to a server on the default cache server port and local host. If multiple pools are declared in * cache.xml or created by the PoolFactory then no default pool will exist and * <code>ClientRegionFactory.setPoolName</code> will need to be called on each region created. * <p> * To get the existing unclosed singleton client cache instance call {@link #getAnyInstance}. * <p> * The following examples illustrate bootstrapping the client cache using region shortcuts: * <p> * Example 1: Connect to a CacheServer on the default host and port and access a region "customers" * * <PRE> * ClientCache c = new ClientCacheFactory().create(); * Region r = c.createClientRegionFactory(PROXY).create("customers"); * // The PROXY shortcut tells GemFire to route all requests to the servers * // . i.e. there is no local caching * </PRE> * * Example 2: Connect using the GemFire locator and create a local LRU cache * * <PRE> * ClientCache c = new ClientCacheFactory().addPoolLocator(host, port).create(); * Region r = c.createClientRegionFactory(CACHING_PROXY_HEAP_LRU).create("customers"); * // The local LRU "customers" data region will automatically start evicting, by default, at 80% * // heap utilization threshold * </PRE> * * Example 3: Access the query service * * <PRE> * QueryService qs = new ClientCacheFactory().create().getQueryService(); * </PRE> * * Example 4: Construct the client cache region declaratively in cache.xml * * <PRE> * <!DOCTYPE client-cache PUBLIC * "-//GemStone Systems, Inc.//GemFire Declarative Caching 6.5//EN" * "http://www.gemstone.com/dtd/cache8_0.dtd"> * <client-cache> * <pool name="myPool"> * <locator host="hostName" port="10334"/> * </pool> * <region name="myRegion" refid="PROXY"/> * <!-- you can override or add to the PROXY attributes by adding * a region-attributes sub element here --> * </client-cache> * </PRE> * * Now, create the cache telling it to read your cache.xml file: * * <PRE> * ClientCache c = new ClientCacheFactory().set("cache-xml-file", "myCache.xml").create(); * Region r = c.getRegion("myRegion"); * </PRE> * <p> * <p> * For a complete list of all client region shortcuts see {@link ClientRegionShortcut}. Applications * that need to explicitly control the individual region attributes can do this declaratively in XML * or using API. * <p> * Example 5: Define custom region attributes for persistence in XML and create region using API. * Define new region attributes with ID "MYAPP_CACHING_PROXY_MEM_LRU" that overrides the * "CACHING_PROXY" shortcut * * <PRE> * <!DOCTYPE client-cache PUBLIC * "-//GemStone Systems, Inc.//GemFire Declarative Caching 8.0//EN" * "http://www.gemstone.com/dtd/cache8_0.dtd"> * <client-cache> * <!-- now create a named region attributes that uses the CACHING_PROXY shortcut * and adds a memory LRU limited to 900 megabytes --> * <region-attributes id="MYAPP_CACHING_PROXY_MEM_LRU" refid="CACHING_PROXY" > * <lru-memory-size maximum="900"/> * </region-attributes> * </client-cache> * </PRE> * * Now, create the data region in the client cache using this new attributes ID. * * <PRE> * ClientCache c = new ClientCacheFactory().set("cache-xml-file", "myCache.xml") * .addPoolLocator(host, port).create(); * Region r = c.createClientRegionFactory("MYAPP_CACHING_PROXY_MEM_LRU").create("customers"); * </PRE> * * @since 6.5 */ public class ClientCacheFactory { private PoolFactory pf; private final Properties dsProps; private final CacheConfig cacheConfig = new CacheConfig(); /** * Creates a new client cache factory. */ public ClientCacheFactory() { this.dsProps = new Properties(); } /** * Create a new client cache factory given the initial gemfire properties. * * @param props The initial gemfire properties to be used. These properties can be overridden * using the {@link #set} method For a full list of valid gemfire properties see * {@link org.apache.geode.distributed.ConfigurationProperties}. */ public ClientCacheFactory(Properties props) { if (props == null) { props = new Properties(); } this.dsProps = props; } /** * Sets a gemfire property that will be used when creating the ClientCache. For a full list of * valid gemfire properties see {@link org.apache.geode.distributed.ConfigurationProperties}. * * @param name the name of the gemfire property * @param value the value of the gemfire property * @return a reference to this ClientCacheFactory object */ public ClientCacheFactory set(String name, String value) { this.dsProps.setProperty(name, value); return this; } /** * Create a singleton client cache. If a client cache already exists in this vm that is not * compatible with this factory's configuration then create will fail. * <p> * While creating the cache instance any declarative cache configuration (cache.xml) is processed * and used to initialize the created cache. * <P> * Note that the cache that is produced is a singleton. Before a different instance can be * produced the old one must be {@link ClientCache#close closed}. * * @return the singleton client cache * @throws CacheXmlException If a problem occurs while parsing the declarative caching XML file. * @throws TimeoutException If a {@link Region#put(Object, Object)} times out while initializing * the cache. * @throws CacheWriterException If a <code>CacheWriterException</code> is thrown while * initializing the cache. * @throws RegionExistsException If the declarative caching XML file describes a region that * already exists (including the root region). * @throws IllegalStateException if a client cache already exists and it is not compatible with * this factory's configuration. * @throws IllegalStateException if mcast-port or locator is set on client cache. * @throws AuthenticationFailedException if authentication fails. * @throws AuthenticationRequiredException if server is in secure mode and client cache is not * configured with security credentials. */ public ClientCache create() { return basicCreate(); } private ClientCache basicCreate() { synchronized (ClientCacheFactory.class) { GemFireCacheImpl instance = GemFireCacheImpl.getInstance(); { String propValue = this.dsProps.getProperty(MCAST_PORT); if (propValue != null) { int mcastPort = Integer.parseInt(propValue); if (mcastPort != 0) { throw new IllegalStateException( "On a client cache the mcast-port must be set to 0 or not set. It was set to " + mcastPort); } } } { String propValue = this.dsProps.getProperty(LOCATORS); if (propValue != null && !propValue.equals("")) { throw new IllegalStateException( "On a client cache the locators property must be set to an empty string or not set. It was set to \"" + propValue + "\"."); } } this.dsProps.setProperty(MCAST_PORT, "0"); this.dsProps.setProperty(LOCATORS, ""); DistributedSystem system = DistributedSystem.connect(this.dsProps); if (instance != null && !instance.isClosed()) { // this is ok; just make sure it is a client cache if (!instance.isClient()) { throw new IllegalStateException( "A client cache can not be created because a non-client cache already exists."); } // check if pool is compatible Pool pool = instance.determineDefaultPool(this.pf); if (pool == null) { if (instance.getDefaultPool() != null) { throw new IllegalStateException("Existing cache's default pool was not compatible"); } } // Check if cache configuration matches. cacheConfig.validateCacheConfig(instance); return instance; } else { GemFireCacheImpl gfc = GemFireCacheImpl.createClient(system, this.pf, cacheConfig); return gfc; } } } private PoolFactory getPoolFactory() { if (this.pf == null) { this.pf = PoolManager.createFactory(); } return this.pf; } /** * Sets the free connection timeout for this pool. If the pool has a max connections setting, * operations will block if all of the connections are in use. The free connection timeout * specifies how long those operations will block waiting for a free connection before receiving * an {@link AllConnectionsInUseException}. If max connections is not set this setting has no * effect. * * @param connectionTimeout the connection timeout in milliseconds * @return a reference to <code>this</code> * @throws IllegalArgumentException if <code>connectionTimeout</code> is less than or equal to * <code>0</code>. * @see #setPoolMaxConnections(int) */ public ClientCacheFactory setPoolFreeConnectionTimeout(int connectionTimeout) { getPoolFactory().setFreeConnectionTimeout(connectionTimeout); return this; } /** * Sets the load conditioning interval for this pool. This interval controls how frequently the * pool will check to see if a connection to a given server should be moved to a different server * to improve the load balance. * <p> * A value of <code>-1</code> disables load conditioning * * @param loadConditioningInterval the connection lifetime in milliseconds * @return a reference to <code>this</code> * @throws IllegalArgumentException if <code>connectionLifetime</code> is less than * <code>-1</code>. */ public ClientCacheFactory setPoolLoadConditioningInterval(int loadConditioningInterval) { getPoolFactory().setLoadConditioningInterval(loadConditioningInterval); return this; } /** * Sets the socket buffer size for each connection made in this pool. Large messages can be * received and sent faster when this buffer is larger. Larger buffers also optimize the rate at * which servers can send events for client subscriptions. * * @param bufferSize the size of the socket buffers used for reading and writing on each * connection in this pool. * @return a reference to <code>this</code> * @throws IllegalArgumentException if <code>bufferSize</code> is less than or equal to * <code>0</code>. */ public ClientCacheFactory setPoolSocketBufferSize(int bufferSize) { getPoolFactory().setSocketBufferSize(bufferSize); return this; } /** * Sets the thread local connections policy for this pool. If <code>true</code> then any time a * thread goes to use a connection from this pool it will check a thread local cache and see if it * already has a connection in it. If so it will use it. If not it will get one from this pool and * cache it in the thread local. This gets rid of thread contention for the connections but * increases the number of connections the servers see. * <p> * If <code>false</code> then connections are returned to the pool as soon as the operation being * done with the connection completes. This allows connections to be shared amonst multiple * threads keeping the number of connections down. * * @param threadLocalConnections if <code>true</code> then enable thread local connections. * @return a reference to <code>this</code> */ public ClientCacheFactory setPoolThreadLocalConnections(boolean threadLocalConnections) { getPoolFactory().setThreadLocalConnections(threadLocalConnections); return this; } /** * Sets the number of milliseconds to wait for a response from a server before timing out the * operation and trying another server (if any are available). * * @param timeout number of milliseconds to wait for a response from a server * @return a reference to <code>this</code> * @throws IllegalArgumentException if <code>timeout</code> is less than <code>0</code>. */ public ClientCacheFactory setPoolReadTimeout(int timeout) { getPoolFactory().setReadTimeout(timeout); return this; } /** * Set the minimum number of connections to keep available at all times. When the pool is created, * it will create this many connections. If <code>0</code> then connections will not be made until * an actual operation is done that requires client-to-server communication. * * @param minConnections the initial number of connections this pool will create. * @return a reference to <code>this</code> * @throws IllegalArgumentException if <code>minConnections</code> is less than <code>0</code>. */ public ClientCacheFactory setPoolMinConnections(int minConnections) { getPoolFactory().setMinConnections(minConnections); return this; } /** * Set the max number of client to server connections that the pool will create. If all of the * connections are in use, an operation requiring a client to server connection will block until a * connection is available. * * @param maxConnections the maximum number of connections in the pool. this pool will create. -1 * indicates that there is no maximum number of connections * @return a reference to <code>this</code> * @throws IllegalArgumentException if <code>maxConnections</code> is less than * <code>minConnections</code>. * @see #setPoolFreeConnectionTimeout(int) */ public ClientCacheFactory setPoolMaxConnections(int maxConnections) { getPoolFactory().setMaxConnections(maxConnections); return this; } /** * Set the amount of time a connection can be idle before expiring the connection. If the pool * size is greater than the minimum specified by {@link #setPoolMinConnections(int)}, connections * which have been idle for longer than the idleTimeout will be closed. * * @param idleTimeout The amount of time in milliseconds that an idle connection should live * before expiring. -1 indicates that connections should never expire. * @return a reference to <code>this</code> * @throws IllegalArgumentException if <code>idleTimout</code> is less than <code>-1</code>. */ public ClientCacheFactory setPoolIdleTimeout(long idleTimeout) { getPoolFactory().setIdleTimeout(idleTimeout); return this; } /** * Set the number of times to retry a request after timeout/exception. * * @param retryAttempts The number of times to retry a request after timeout/exception. -1 * indicates that a request should be tried against every available server before failing * @return a reference to <code>this</code> * @throws IllegalArgumentException if <code>idleTimout</code> is less than <code>-1</code>. */ public ClientCacheFactory setPoolRetryAttempts(int retryAttempts) { getPoolFactory().setRetryAttempts(retryAttempts); return this; } /** * How often to ping servers to verify that they are still alive. Each server will be sent a ping * every pingInterval if there has not been any other communication with the server. * <p> * These pings are used by the server to monitor the health of the client. Make sure that the * pingInterval is less than the maximum time between pings allowed by the cache server. * * @param pingInterval The amount of time in milliseconds between pings. * @return a reference to <code>this</code> * @throws IllegalArgumentException if <code>pingInterval</code> is less than or equal to * <code>0</code>. * @see CacheServer#setMaximumTimeBetweenPings(int) */ public ClientCacheFactory setPoolPingInterval(long pingInterval) { getPoolFactory().setPingInterval(pingInterval); return this; } /** * How often to send client statistics to the server. Doing this allows <code>gfmon</code> to * monitor clients. * <p> * A value of <code>-1</code> disables the sending of client statistics to the server. * * @param statisticInterval The amount of time in milliseconds between sends of client statistics * to the server. * @return a reference to <code>this</code> * @throws IllegalArgumentException if <code>statisticInterval</code> is less than * <code>-1</code>. */ public ClientCacheFactory setPoolStatisticInterval(int statisticInterval) { getPoolFactory().setStatisticInterval(statisticInterval); return this; } /** * Configures the group that all servers this pool connects to must belong to. * * @param group the server group that this pool will connect to. If <code>null</code> or * <code>""</code> then all servers will be connected to. * @return a reference to <code>this</code> */ public ClientCacheFactory setPoolServerGroup(String group) { getPoolFactory().setServerGroup(group); return this; } /** * Add a locator, given its host and port, to this factory. The locator must be a server locator * and will be used to discover other running cache servers and locators. Note that if the host is * unknown at the time of this call the locator will still be added. When the pool is used for an * operation if the host is still unknown an exception will be thrown. * * @param host the host name or ip address that the locator is listening on. * @param port the port that the locator is listening on * @return a reference to <code>this</code> * @throws IllegalArgumentException if port is outside the valid range of [0..65535] inclusive. * @throws IllegalStateException if a server has already been {@link #addPoolServer added} to this * factory. */ public ClientCacheFactory addPoolLocator(String host, int port) { getPoolFactory().addLocator(host, port); return this; } /** * Add a server, given its host and port, to this factory. The server must be a cache server and * this client will directly connect to without consulting a server locator. Note that if the host * is unknown at the time of this call the server will still be added. When the pool is used for * an operation if the host is still unknown an exception will be thrown. * * @param host the host name or ip address that the server is listening on. * @param port the port that the server is listening on * @return a reference to <code>this</code> * @throws IllegalArgumentException if port is outside the valid range of [0..65535] inclusive. * @throws IllegalStateException if a locator has already been {@link #addPoolLocator added} to * this factory. */ public ClientCacheFactory addPoolServer(String host, int port) { getPoolFactory().addServer(host, port); return this; } /** * If set to <code>true</code> then the created pool will have server-to-client subscriptions * enabled. If set to <code>false</code> then all <code>Subscription*</code> attributes are * ignored at create time. * * @return a reference to <code>this</code> */ public ClientCacheFactory setPoolSubscriptionEnabled(boolean enabled) { getPoolFactory().setSubscriptionEnabled(enabled); return this; } /** * Sets the redundancy level for this pools server-to-client subscriptions. If <code>0</code> then * no redundant copies will be kept on the servers. Otherwise an effort will be made to maintain * the requested number of copies of the server-to-client subscriptions. At most one copy per * server will be made up to the requested level. * * @param redundancy the number of redundant servers for this client's subscriptions. * @return a reference to <code>this</code> * @throws IllegalArgumentException if <code>redundancyLevel</code> is less than <code>-1</code>. */ public ClientCacheFactory setPoolSubscriptionRedundancy(int redundancy) { getPoolFactory().setSubscriptionRedundancy(redundancy); return this; } /** * Sets the messageTrackingTimeout attribute which is the time-to-live period, in milliseconds, * for subscription events the client has received from the server. It's used to minimize * duplicate events. Entries that have not been modified for this amount of time are expired from * the list * * @param messageTrackingTimeout number of milliseconds to set the timeout to. * @return a reference to <code>this</code> * @throws IllegalArgumentException if <code>messageTrackingTimeout</code> is less than or equal * to <code>0</code>. */ public ClientCacheFactory setPoolSubscriptionMessageTrackingTimeout(int messageTrackingTimeout) { getPoolFactory().setSubscriptionMessageTrackingTimeout(messageTrackingTimeout); return this; } /** * Sets the interval in milliseconds to wait before sending acknowledgements to the cache server * for events received from the server subscriptions. * * @param ackInterval number of milliseconds to wait before sending event acknowledgements. * @return a reference to <code>this</code> * @throws IllegalArgumentException if <code>ackInterval</code> is less than or equal to * <code>0</code>. */ public ClientCacheFactory setPoolSubscriptionAckInterval(int ackInterval) { getPoolFactory().setSubscriptionAckInterval(ackInterval); return this; } /** * By default setPRSingleHopEnabled is <code>true</code> in which case the client is aware of the * location of partitions on servers hosting {@link Region regions} with * {@link org.apache.geode.cache.DataPolicy#PARTITION}. Using this information, the client routes * the client cache operations directly to the server which is hosting the required partition for * the cache operation using a single network hop. This mode works best when * {@link #setPoolMaxConnections(int)} is set to <code>-1</code> which is the default. This mode * causes the client to have more connections to the servers. * <p> * If setPRSingleHopEnabled is <code>false</code> the client may need to do an extra network hop * on servers to go to the required partition for that cache operation. The client will use fewer * network connections to the servers. * <p> * Caution: for {@link org.apache.geode.cache.DataPolicy#PARTITION partition} regions with * {@link org.apache.geode.cache.PartitionAttributesFactory#setLocalMaxMemory(int) * local-max-memory} equal to zero, no cache operations mentioned above will be routed to those * servers as they do not host any partitions. * * @return the newly created pool. */ public ClientCacheFactory setPoolPRSingleHopEnabled(boolean enabled) { getPoolFactory().setPRSingleHopEnabled(enabled); return this; } /** * If set to <code>true</code> then the created pool can be used by multiple users. <br> * <br> * Note: If set to true, all the client side regions must be {@link ClientRegionShortcut#PROXY * proxies}. No client side storage is allowed. * * @return a reference to <code>this</code> */ public ClientCacheFactory setPoolMultiuserAuthentication(boolean enabled) { getPoolFactory().setMultiuserAuthentication(enabled); return this; } /** * Returns the version of the cache implementation. * * @return the version of the cache implementation as a <code>String</code> */ public static String getVersion() { return GemFireVersion.getGemFireVersion(); } /** * Gets an arbitrary open instance of {@link ClientCache} produced by an earlier call to * {@link #create}. * * @throws CacheClosedException if a cache has not been created or the only created one is * {@link ClientCache#isClosed closed} * @throws IllegalStateException if the cache was created by CacheFactory instead of * ClientCacheFactory */ public static synchronized ClientCache getAnyInstance() { GemFireCacheImpl instance = GemFireCacheImpl.getInstance(); if (instance == null) { throw new CacheClosedException( LocalizedStrings.CacheFactory_A_CACHE_HAS_NOT_YET_BEEN_CREATED.toLocalizedString()); } else { if (!instance.isClient()) { throw new IllegalStateException( "The singleton cache was created by CacheFactory not ClientCacheFactory."); } instance.getCancelCriterion().checkCancelInProgress(null); return instance; } } /** * Sets the object preference to PdxInstance type. When a cached object that was serialized as a * PDX is read from the cache a {@link PdxInstance} will be returned instead of the actual domain * class. The PdxInstance is an interface that provides run time access to the fields of a PDX * without deserializing the entire PDX. The PdxInstance implementation is a light weight wrapper * that simply refers to the raw bytes of the PDX that are kept in the cache. Using this method * applications can choose to access PdxInstance instead of Java object. * <p> * Note that a PdxInstance is only returned if a serialized PDX is found in the cache. If the * cache contains a deserialized PDX, then a domain class instance is returned instead of a * PdxInstance. * * @param pdxReadSerialized true to prefer PdxInstance * @return this ClientCacheFactory * @since GemFire 6.6 * @see org.apache.geode.pdx.PdxInstance */ public ClientCacheFactory setPdxReadSerialized(boolean pdxReadSerialized) { this.cacheConfig.setPdxReadSerialized(pdxReadSerialized); return this; } /** * Set the PDX serializer for the cache. If this serializer is set, it will be consulted to see if * it can serialize any domain classes which are added to the cache in portable data exchange * format. * * @param serializer the serializer to use * @return this ClientCacheFactory * @since GemFire 6.6 * @see PdxSerializer */ public ClientCacheFactory setPdxSerializer(PdxSerializer serializer) { this.cacheConfig.setPdxSerializer(serializer); return this; } /** * Set the disk store that is used for PDX meta data. When serializing objects in the PDX format, * the type definitions are persisted to disk. This setting controls which disk store is used for * that persistence. * <p> * If not set, the metadata will go in the default disk store. * * @param diskStoreName the name of the disk store to use for the PDX metadata. * @return this ClientCacheFactory * @since GemFire 6.6 */ public ClientCacheFactory setPdxDiskStore(String diskStoreName) { this.cacheConfig.setPdxDiskStore(diskStoreName); return this; } /** * Control whether the type metadata for PDX objects is persisted to disk. The default for this * setting is false. If you are using persistent regions with PDX then you must set this to true. * If you are using a WAN gateway with PDX then you should set this to true. * * @param isPersistent true if the metadata should be persistent * @return this ClientCacheFactory * @since GemFire 6.6 */ public ClientCacheFactory setPdxPersistent(boolean isPersistent) { this.cacheConfig.setPdxPersistent(isPersistent); return this; } /** * Control whether pdx ignores fields that were unread during deserialization. The default is to * preserve unread fields be including their data during serialization. But if you configure the * cache to ignore unread fields then their data will be lost during serialization. * <P> * You should only set this attribute to <code>true</code> if you know this member will only be * reading cache data. In this use case you do not need to pay the cost of preserving the unread * fields since you will never be reserializing pdx data. * * @param ignore <code>true</code> if fields not read during pdx deserialization should be * ignored; <code>false</code>, the default, if they should be preserved. * @return this ClientCacheFactory * @since GemFire 6.6 */ public ClientCacheFactory setPdxIgnoreUnreadFields(boolean ignore) { this.cacheConfig.setPdxIgnoreUnreadFields(ignore); return this; } }