/** Test the Client.getShardMaps() without a match pattern (all maps). */
public void testDumpShardMapsAll() throws Exception {
Set<ShardMapping> shardMappings = this.client.getShardMappings().getData();
assertEquals(1, shardMappings.size());
ShardMapping shardMapping = shardMappings.iterator().next();
assertEquals(1, shardMapping.getShardTables().size());
}
public void testHashShardMappingKeyLookup() throws Exception {
final String globalGroupName = "My global group";
final String lowerBounds[] =
new String[] {
/* 0 = */ "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA",
/* 1 = */ "66666666666666666666666666666666",
/* 2 = */ "2809A05A22A4A9C1882A580BCC0AD8A6",
/* 3 = */ "DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD"
};
// setup the mapping
Set<ShardIndex> shardIndices = new HashSet<ShardIndex>();
int shardId = 0; // shard id's added sequentially increasing from 0
for (String lowerBound : lowerBounds) {
ShardIndex i = new ShardIndex(lowerBound, shardId, "server_group_" + shardId);
shardId++;
shardIndices.add(i);
}
ShardMapping mapping =
new HashShardMapping(5000, ShardingType.HASH, globalGroupName, null, shardIndices);
// test lookups mapping of test value to the group it maps to test values are hashed with MD5
// and compared to lowerBounds values
String testPairs[][] =
new String[][] {
// exact match should be in that shard
new String[] {"Jess", "server_group_2"}, // hash = 2809a05a22a4a9c1882a580bcc0ad8a6
new String[] {"x", "server_group_1"}, // hash = 9dd4e461268c8034f5c8564e155c67a6
new String[] {"X", "server_group_3"}, // hash = 02129bb861061d1a052c592e2dc6b383
new String[] {"Y", "server_group_2"}, // hash = 57cec4137b614c87cb4e24a3d003a3e0
new String[] {"g", "server_group_0"}, // hash = b2f5ff47436671b6e533d8dc3614845d
// leading zeroes
new String[] {"168", "server_group_3"}, // hash = 006f52e9102a8d3be2fe5614f42ba989
};
for (String[] testPair : testPairs) {
String key = testPair[0];
String serverGroup = testPair[1];
assertEquals(serverGroup, mapping.getGroupNameForKey(key));
}
// test a random set of values. we should never return null
for (int i = 0; i < 1000; ++i) {
assertNotNull(mapping.getGroupNameForKey("" + i));
}
}
/** Test that a range based shard mapping looks up groups for keys correctly. */
public void testRangeShardMappingKeyLookup() throws Exception {
final String globalGroupName = "My global group";
final int lowerBounds[] = new int[] {1, 10000, 1001, 400, 1000, 470};
final int lowestLowerBound = 1;
// setup the mapping
Set<ShardIndex> shardIndices = new HashSet<ShardIndex>();
int shardId = 0; // shard id's added sequentially increasing from 0
for (Integer lowerBound : lowerBounds) {
ShardIndex i = new ShardIndex(String.valueOf(lowerBound), shardId, "shard_group_" + shardId);
shardId++;
shardIndices.add(i);
}
ShardMapping mapping =
new RangeShardMapping(5000, ShardingType.RANGE, globalGroupName, null, shardIndices);
// try adding a second shard index with a lower bound that conflicts with an existing one this
// should be prohibited
// mapping.addShardIndex(new ShardIndex(mapping, "1", 0, ""));
// test looking up a key out of range doesn't work
try {
mapping.getGroupNameForKey(String.valueOf(lowestLowerBound - 1));
fail("Looking up a key with a value below the lowest bound is invalid");
} catch (Exception ex) {
}
try {
mapping.getGroupNameForKey(String.valueOf(lowestLowerBound - 1000));
fail("Looking up a key with a value below the lowest bound is invalid");
} catch (Exception ex) {
}
// test key lookups for lower bound values
for (shardId = 0; shardId < lowerBounds.length; ++shardId) {
int lowerBound = lowerBounds[shardId];
String groupName = mapping.getGroupNameForKey(String.valueOf(lowerBound));
assertEquals("Exact lookup for key " + lowerBound, "shard_group_" + shardId, groupName);
}
}