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TestThriftToPig.java
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TestThriftToPig.java
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package com.twitter.elephantbird.pig.piggybank;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.List;
import org.apache.pig.LoadPushDown.RequiredField;
import org.apache.pig.LoadPushDown.RequiredFieldList;
import org.apache.pig.backend.executionengine.ExecException;
import org.apache.pig.data.DataByteArray;
import org.apache.pig.data.Tuple;
import org.apache.pig.data.TupleFactory;
import org.apache.thrift.TBase;
import org.apache.thrift.TException;
import org.apache.thrift.Fixtures;
import org.junit.Test;
import thrift.test.HolyMoley;
import thrift.test.Nesting;
import thrift.test.OneOfEach;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Lists;
import com.twitter.data.proto.tutorial.thrift.Name;
import com.twitter.data.proto.tutorial.thrift.Person;
import com.twitter.data.proto.tutorial.thrift.PhoneNumber;
import com.twitter.data.proto.tutorial.thrift.PhoneType;
import com.twitter.elephantbird.mapreduce.io.ThriftConverter;
import com.twitter.elephantbird.pig.util.ProjectedThriftTupleFactory;
import com.twitter.elephantbird.pig.util.ThriftToPig;
import com.twitter.elephantbird.pig.util.PigToThrift;
import com.twitter.elephantbird.thrift.TStructDescriptor.Field;
import com.twitter.elephantbird.thrift.test.TestName;
import com.twitter.elephantbird.thrift.test.TestPerson;
import com.twitter.elephantbird.thrift.test.TestPhoneType;
import com.twitter.elephantbird.util.TypeRef;
public class TestThriftToPig {
private static final TupleFactory tupleFactory = TupleFactory.getInstance();
private static enum TestType {
THRIFT_TO_PIG,
BYTES_TO_TUPLE,
TUPLE_TO_THRIFT,
}
static <M extends TBase<?, ?>> Tuple thriftToPig(M obj) throws TException {
// it is very inefficient to create one ThriftToPig for each Thrift object,
// but good enough for unit testing.
TypeRef<M> typeRef = new TypeRef<M>(obj.getClass()){};
ThriftToPig<M> thriftToPig = ThriftToPig.newInstance(typeRef);
Tuple t = thriftToPig.getPigTuple(obj);
// test projected tuple. project a subset of fields based on field name.
List<Field> tFields = thriftToPig.getTStructDescriptor().getFields();
List<Integer> idxList = Lists.newArrayList();
RequiredFieldList reqFieldList = new RequiredFieldList();
for (int i=0; i < tFields.size(); i++) {
String name = tFields.get(i).getName();
if (name.hashCode()%2 == 0) {
RequiredField rf = new RequiredField();
rf.setAlias(name);
rf.setIndex(i);
reqFieldList.add(rf);
idxList.add(i);
}
}
try {
Tuple pt = new ProjectedThriftTupleFactory<M>(typeRef, reqFieldList).newTuple(obj);
int pidx=0;
for(int idx : idxList) {
assertEquals(t.get(idx).toString(), pt.get(pidx++).toString());
}
} catch (ExecException e) { // not expected
throw new TException(e);
}
// return the full tuple
return t;
}
static <M extends TBase<?, ?>> Tuple thriftToLazyTuple(M obj) throws TException {
return ThriftToPig.newInstance(new TypeRef<M>(obj.getClass()){}).getLazyTuple(obj);
}
static <M extends TBase<?, ?>> Tuple bytesToTuple(M obj)
throws TException, ExecException, IOException {
// test ThriftBytesToTuple UDF.
// first serialize obj and then invoke the UDF.
TypeRef<M> typeRef = new TypeRef<M>(obj.getClass()){};
ThriftConverter<M> converter = ThriftConverter.newInstance(typeRef);
ThriftBytesToTuple<M> tTuple = new ThriftBytesToTuple<M>(obj.getClass().getName());
Tuple tuple = tupleFactory.newTuple(1);
tuple.set(0, new DataByteArray(converter.toBytes(obj)));
return tTuple.exec(tuple);
}
static <M extends TBase<?, ?>> Tuple pigToThrift(M obj) throws TException {
// Test PigToThrift using the tuple returned by thriftToPig.
// also use LazyTuple
Tuple t = thriftToLazyTuple(obj);
PigToThrift<M> p2t = PigToThrift.newInstance(new TypeRef<M>(obj.getClass()){});
assertEquals(obj, p2t.getThriftObject(t));
return t;
}
static <M extends TBase<?, ?>> Tuple toTuple(TestType type, M obj) throws Exception {
switch (type) {
case THRIFT_TO_PIG:
return thriftToPig(obj);
case BYTES_TO_TUPLE:
return bytesToTuple(obj);
case TUPLE_TO_THRIFT:
return pigToThrift(obj);
default:
return null;
}
}
@Test
public void test() throws Exception {
tupleTest(TestType.THRIFT_TO_PIG);
tupleTest(TestType.BYTES_TO_TUPLE);
tupleTest(TestType.TUPLE_TO_THRIFT);
}
private void tupleTest(TestType type) throws Exception {
OneOfEach ooe = Fixtures.oneOfEach;
Nesting n = Fixtures.nesting;
ThriftConverter<HolyMoley> hmConverter = ThriftConverter.newInstance(HolyMoley.class);
// use a deserialized hm object so that hm.contains HashSet iteration is a bit more predictable
HolyMoley hm = hmConverter.fromBytes(hmConverter.toBytes(Fixtures.holyMoley));
assertEquals(
"1-0-35-27000-16777216-6000000000-3.141592653589793-JSON THIS! \"-"+ooe.zomg_unicode+"-0-base64-{(1),(2),(3)}-{(1),(2),(3)}-{(1),(2),(3)}",
toTuple(type, ooe).toDelimitedString("-"));
assertEquals("(31337,I am a bonk... xor!)-(1,0,35,27000,16777216,6000000000,3.141592653589793,JSON THIS! \","+n.my_ooe.zomg_unicode+",0,base64,{(1),(2),(3)},{(1),(2),(3)},{(1),(2),(3)})",
toTuple(type, n).toDelimitedString("-"));
assertEquals("{(1,0,34,27000,16777216,6000000000,3.141592653589793,JSON THIS! \"," + ooe.zomg_unicode +
",0,base64,{(1),(2),(3)},{(1),(2),(3)},{(1),(2),(3)}),(1,0,35,27000,16777216,6000000000,3.141592653589793,JSON THIS! \"," +
ooe.zomg_unicode + ",0,base64,{(1),(2),(3)},{(1),(2),(3)},{(1),(2),(3)})}-{({}),({(and a one),(and a two)}),({(then a one, two),(three!),(FOUR!!)})}-{zero={}, three={}, two={(1,Wait.),(2,What?)}}",
(toTuple(type, hm).toDelimitedString("-")));
// Test null fields. Pick the fields that have defaults of null
// so that extra round of seralization and deserialization does not affect it.
OneOfEach mostly_ooe = new OneOfEach(ooe);
mostly_ooe.setBase64((ByteBuffer)null);
mostly_ooe.setZomg_unicode(null);
assertEquals(
"1-0-35-27000-16777216-6000000000-3.141592653589793-JSON THIS! \"--0--{(1),(2),(3)}-{(1),(2),(3)}-{(1),(2),(3)}",
toTuple(type, mostly_ooe).toDelimitedString("-"));
Nesting n2 = new Nesting(n);
n2.getMy_bonk().setMessage(null);
n2.setMy_ooe(mostly_ooe);
assertEquals("(31337,)-(1,0,35,27000,16777216,6000000000,3.141592653589793,JSON THIS! \",,0,,{(1),(2),(3)},{(1),(2),(3)},{(1),(2),(3)})",
toTuple(type, n2).toDelimitedString("-"));
// test enum.
PhoneNumber ph = new PhoneNumber();
ph.setNumber("415-555-5555");
ph.setType(PhoneType.HOME);
assertEquals("415-555-5555,HOME", toTuple(type, ph).toDelimitedString(","));
Person person = new Person(new Name("bob", "jenkins"), 42, "foo@bar.com", Lists.newArrayList(ph));
assertEquals("(bob,jenkins),42,foo@bar.com,{(415-555-5555,HOME)}", toTuple(type, person).toDelimitedString(","));
// test Enum map
TestPerson testPerson = new TestPerson(
new TestName("bob", "jenkins"),
ImmutableMap.of(
TestPhoneType.HOME, "408-555-5555",
TestPhoneType.MOBILE, "650-555-5555",
TestPhoneType.WORK, "415-555-5555"));
String tupleString = toTuple(type, testPerson).toDelimitedString("-");
assertTrue( // the order of elements in map could vary because of HashMap
tupleString.equals("(bob,jenkins)-{MOBILE=650-555-5555, WORK=415-555-5555, HOME=408-555-5555}") ||
tupleString.equals("(bob,jenkins)-{MOBILE=650-555-5555, HOME=408-555-5555, WORK=415-555-5555}")
);
}
}