Examples with SchemaChangeListener org.apache.cassandra.schema.SchemaChangeListener used on opensource projects

Example 1 with SchemaChangeListener

use of org.apache.cassandra.schema.SchemaChangeListener in project cassandra by apache.

the class CompactTableTest method dropCompactStorageShouldInvalidatePreparedStatements.

@Test
public void dropCompactStorageShouldInvalidatePreparedStatements() throws Throwable {
    createTable("CREATE TABLE %s (pk int, ck int, v int, PRIMARY KEY (pk, ck)) WITH COMPACT STORAGE;");
    execute("INSERT INTO %s (pk, ck, v) VALUES (1, 1, 1)");
    String templateSelect = "SELECT * FROM %s WHERE pk = 1";
    assertRows(execute(templateSelect), row(1, 1, 1));
    // Verify that the prepared statement has been added to the cache after our first query.
    String formattedQuery = formatQuery(templateSelect);
    ConcurrentMap<String, QueryHandler.Prepared> original = QueryProcessor.getInternalStatements();
    assertTrue(original.containsKey(formattedQuery));
    // Verify that schema change listeners are told statements are affected with DROP COMPACT STORAGE.
    SchemaChangeListener listener = new SchemaChangeListener() {

        public void onAlterTable(String keyspace, String table, boolean affectsStatements) {
            assertTrue(affectsStatements);
        }
    };
    Schema.instance.registerListener(listener);
    try {
        alterTable("ALTER TABLE %s DROP COMPACT STORAGE");
        ConcurrentMap<String, QueryHandler.Prepared> postDrop = QueryProcessor.getInternalStatements();
        // Verify that the prepared statement has been removed the cache after DROP COMPACT STORAGE.
        assertFalse(postDrop.containsKey(formattedQuery));
        // Verify that the prepared statement has been added back to the cache after our second query.
        assertRows(execute(templateSelect), row(1, 1, 1));
        ConcurrentMap<String, QueryHandler.Prepared> postQuery = QueryProcessor.getInternalStatements();
        assertTrue(postQuery.containsKey(formattedQuery));
    } finally {
        // Clean up the listener so this doesn't fail other tests.
        Schema.instance.unregisterListener(listener);
    }
}