Examples with Expression org.apache.ratis.examples.arithmetic.expression.Expression used on opensource projects

Example 1 with Expression

use of org.apache.ratis.examples.arithmetic.expression.Expression in project incubator-ratis by apache.

the class ArithmeticStateMachine method applyTransaction.

@Override
public CompletableFuture<Message> applyTransaction(TransactionContext trx) {
    final LogEntryProto entry = trx.getLogEntry();
    final AssignmentMessage assignment = new AssignmentMessage(entry.getSmLogEntry().getData());
    final long index = entry.getIndex();
    final Double result;
    try (final AutoCloseableLock writeLock = writeLock()) {
        result = assignment.evaluate(variables);
        updateLastAppliedTermIndex(entry.getTerm(), index);
    }
    final Expression r = Expression.Utils.double2Expression(result);
    LOG.debug("{}-{}: {} = {}", getId(), index, assignment, r);
    if (LOG.isTraceEnabled()) {
        LOG.trace("{}-{}: variables={}", getId(), index, variables);
    }
    return CompletableFuture.completedFuture(Expression.Utils.toMessage(r));
}

Example 2 with Expression

use of org.apache.ratis.examples.arithmetic.expression.Expression in project incubator-ratis by apache.

the class ArithmeticStateMachine method query.

@Override
public CompletableFuture<Message> query(Message request) {
    final Expression q = Expression.Utils.bytes2Expression(request.getContent().toByteArray(), 0);
    final Double result;
    try (final AutoCloseableLock readLock = readLock()) {
        result = q.evaluate(variables);
    }
    final Expression r = Expression.Utils.double2Expression(result);
    LOG.debug("QUERY: {} = {}", q, r);
    return CompletableFuture.completedFuture(Expression.Utils.toMessage(r));
}

Example 3 with Expression

use of org.apache.ratis.examples.arithmetic.expression.Expression in project incubator-ratis by apache.

the class TestArithmetic method assertRaftClientReply.

static Expression assertRaftClientReply(RaftClientReply reply, Double expected) {
    Assert.assertTrue(reply.isSuccess());
    final Expression e = Expression.Utils.bytes2Expression(reply.getMessage().getContent().toByteArray(), 0);
    if (expected != null) {
        Assert.assertEquals(expected, e.evaluate(null));
    }
    return e;
}

Example 4 with Expression

use of org.apache.ratis.examples.arithmetic.expression.Expression in project incubator-ratis by apache.

the class TestArithmetic method assignNull.

static void assignNull(RaftClient client, Variable x) throws IOException {
    final Expression e = assign(client, x, NullValue.getInstance());
    Assert.assertEquals(NullValue.getInstance(), e);
}

Example 5 with Expression

use of org.apache.ratis.examples.arithmetic.expression.Expression in project incubator-ratis by apache.

the class TestArithmetic method runTestPythagorean.

public static void runTestPythagorean(RaftClient client, int start, int count) throws IOException {
    Preconditions.assertTrue(count > 0, () -> "count = " + count + " <= 0");
    Preconditions.assertTrue(start >= 2, () -> "start = " + start + " < 2");
    final Variable a = new Variable("a");
    final Variable b = new Variable("b");
    final Variable c = new Variable("c");
    final Expression pythagorean = SQRT.apply(ADD.apply(SQUARE.apply(a), SQUARE.apply(b)));
    final int end = start + 2 * count;
    for (int n = (start & 1) == 0 ? start + 1 : start; n < end; n += 2) {
        int n2 = n * n;
        int half_n2 = n2 / 2;
        assign(client, a, n);
        assign(client, b, half_n2);
        assign(client, c, pythagorean, (double) half_n2 + 1);
        assignNull(client, a);
        assignNull(client, b);
        assignNull(client, c);
    }
}