Apache Ignite : How to list all tables and all Caches

问题

Is there any way to list all tables present in a specific Cache and list all caches present on a Apache Ignite Server?

----------------------------------UPDATED-------------------------- Hi, I am running following code to know Cache name and list all tables present in my cache. This program list outs all cache name present on server. However table listing is printed as blank collection. Meanwhile SQL query present in example is working fine.

public static void main(String[] args) throws Exception {
        System.out.println("Run Spring example!!");
        Ignition.setClientMode(true);
        IgniteConfiguration cfg = new IgniteConfiguration();
        cfg.setIncludeEventTypes( EVTS_CACHE);
        cfg.setPeerClassLoadingEnabled(true);
        TcpDiscoveryMulticastIpFinder discoveryMulticastIpFinder = new TcpDiscoveryMulticastIpFinder();
        Set<String> set = new HashSet<>();

        set.add("hostname:47500..47509");

        discoveryMulticastIpFinder.setAddresses(set);

        TcpDiscoverySpi discoverySpi = new TcpDiscoverySpi();
        discoverySpi.setIpFinder(discoveryMulticastIpFinder);

        cfg.setDiscoverySpi(discoverySpi);

        cfg.setPeerClassLoadingEnabled(true);
        cfg.setIncludeEventTypes(EVTS_CACHE);
        Ignite ignite = Ignition.start(cfg);

        System.out.println("All Available Cache on server : "+ignite.cacheNames());

        CacheConfiguration<String, BinaryObject> cacheConfiguration = new CacheConfiguration<>(CACHE_NAME);

        Collection<QueryEntity> entities = cacheConfiguration.getQueryEntities();
        System.out.println("All available tables in cache : "+entities);

        cacheConfiguration.setIndexedTypes(String.class, BinaryObject.class);
        //cacheConfiguration.setCacheMode(CacheMode.PARTITIONED);

        IgniteCache<String, BinaryObject> cache = ignite.getOrCreateCache(cacheConfiguration).withKeepBinary();

        System.out.println();





            QueryCursor<List<?>> query = cache.query(new SqlFieldsQuery("select Field1 from table1 where Field1='TEST'"));
            List<List<?>> all = query.getAll();
            for (List<?> l : all) {
                System.out.println(l);
            }

    }

回答1:

Get all cache names: Ignite.cacheNames(). Then use Ignite.cache(String) to get the cache instance.

Get SQL tables:

CacheConfiguration ccfg = cache.getConfiguration(CacheConfiguration.class);
Collection<QueryEntity> entities = ccfg.getQueryEntities();

Each query entity represents a table.

回答2:

You can get all cache names using Ignite.cacheNames(). In order to get all table names you can use SHOW TABLES command:

QueryCursor<List<?>> cursor = cache.query(new SqlFieldsQuery("SHOW TABLES FROM \""+CACHE_NAME+"\""));
for (List<?> row : cursor) {
    System.out.println(row.get(0));
}

More details about the SHOW command you can find here: http://www.h2database.com/html/grammar.html#show

来源：https://stackoverflow.com/questions/43049782/apache-ignite-how-to-list-all-tables-and-all-caches

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java

ignite