private boolean canRetryDriverConnection(Exception e) {
if (e instanceof DriverException && e.getMessage().contains("Connection thread interrupted"))
return true;
if (e instanceof NoHostAvailableException) {
if (((NoHostAvailableException) e).getErrors().values().size() == 1) {
Throwable cause = ((NoHostAvailableException) e).getErrors().values().iterator().next();
if (cause != null
&& cause.getCause() instanceof java.nio.channels.ClosedByInterruptException) {
return true;
}
}
}
return false;
}
public static void main(String[] args) {
for (int i = 0; i < args.length; ++i) {
if ("-endpoint".equals(args[i])) {
endpoint = args[++i];
} else if ("-keyspace".equals(args[i])) {
keyspace = args[++i];
} else if ("-table".equals(args[i])) {
table = args[++i];
} else {
System.err.println("ConsistencyTest -endpoint hostname -keyspace keyspace -table table");
}
}
if (endpoint == null || keyspace == null || table == null) {
System.err.println("ConsistencyTest -endpoint hostname -keyspace keyspace -table table");
System.exit(1);
}
String[] endpoints = endpoint.split(":");
try {
cluster =
Cluster.builder()
.addContactPoints(endpoints)
.withRetryPolicy(DefaultRetryPolicy.INSTANCE)
.withLoadBalancingPolicy(new TokenAwarePolicy(new DCAwareRoundRobinPolicy()))
.build();
session = cluster.connect(keyspace);
// work with ONE for both write and read
long s1 = System.currentTimeMillis();
Statement insert =
QueryBuilder.insertInto(table)
.value("user_id", 100)
.value("fname", "john")
.value("lname", "yamada")
.value("number", 100);
insert.setConsistencyLevel(ConsistencyLevel.ONE);
session.execute(insert);
long e1 = System.currentTimeMillis();
System.out.println("write ONE time taken (ms) : " + (e1 - s1));
long s2 = System.currentTimeMillis();
Statement select =
QueryBuilder.select().all().from(table).where(QueryBuilder.eq("user_id", 100));
select.setConsistencyLevel(ConsistencyLevel.ONE);
results = session.execute(select);
for (Row row : results) {
System.out.format(
"%d %s %s %d\n",
row.getInt("user_id"),
row.getString("fname"),
row.getString("lname"),
row.getInt("number"));
}
long e2 = System.currentTimeMillis();
System.out.println("read ONE time taken (ms) : " + (e2 - s2));
Statement delete = QueryBuilder.delete().from(table).where(QueryBuilder.eq("user_id", 100));
results = session.execute(delete);
// work with QUORUM for both write and read
long s3 = System.currentTimeMillis();
Statement insert2 =
QueryBuilder.insertInto(table)
.value("user_id", 200)
.value("fname", "john")
.value("lname", "yamada")
.value("number", 100);
insert2.setConsistencyLevel(ConsistencyLevel.QUORUM);
session.execute(insert2);
long e3 = System.currentTimeMillis();
System.out.println("write QUORUM time taken (ms) : " + (e3 - s3));
long s4 = System.currentTimeMillis();
Statement select2 =
QueryBuilder.select().all().from(table).where(QueryBuilder.eq("user_id", 200));
select2.setConsistencyLevel(ConsistencyLevel.QUORUM);
results = session.execute(select2);
for (Row row : results) {
System.out.format(
"%d %s %s %d\n",
row.getInt("user_id"),
row.getString("fname"),
row.getString("lname"),
row.getInt("number"));
}
long e4 = System.currentTimeMillis();
System.out.println("read QUORUM time taken (ms) : " + (e4 - s4));
Statement delete2 = QueryBuilder.delete().from(table).where(QueryBuilder.eq("user_id", 200));
results = session.execute(delete2);
// Clean up the connection by closing it
cluster.close();
} catch (Exception e) {
e.printStackTrace();
}
}