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package org.dcache.resilience.util;
import org.junit.Before;
import org.junit.Test;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;
import java.util.stream.Collectors;
import diskCacheV111.poolManager.StorageUnit;
import diskCacheV111.util.CacheException;
import org.dcache.resilience.TestBase;
import org.dcache.resilience.data.StorageUnitConstraints;
import org.dcache.vehicles.FileAttributes;
import static org.junit.Assert.assertTrue;
public final class CopyLocationExtractorTest extends TestBase {
private String pool;
private FileAttributes attributes;
private StorageUnit unit;
private Collection<String> selected;
private CopyLocationExtractor extractor;
@Before
public void setUp() throws CacheException {
setUpBase();
}
@Test
public void shouldChooseAnyPoolWhenSourceWithBothConstraintsOnPoolWithNoTags()
throws CacheException {
givenNewFilesOnPoolsWithNoTags();
givenAReplicaOnlineFileWithBothTags();
givenTheSourceAndConstraintsOfThisFile();
whenTheExtractorIsCalledForTheNextSetOfLocations();
assertTrue(theSelectedPoolsWere(allAvailablePools()));
}
@Test
public void shouldChooseAnyPoolWhenSourceWithHostConstraintOnPoolWithNoTags()
throws CacheException {
givenNewFilesOnPoolsWithNoTags();
givenAReplicaOnlineFileWithHostTag();
givenTheSourceAndConstraintsOfThisFile();
whenTheExtractorIsCalledForTheNextSetOfLocations();
assertTrue(theSelectedPoolsWere(allAvailablePools()));
}
@Test
public void shouldChooseAnyPoolWhenSourceWithNoConstraintsOnPoolWithBothTags()
throws CacheException {
givenNewFilesOnPoolsWithHostAndRackTags();
givenAReplicaOnlineFileWithNoTags();
givenTheSourceAndConstraintsOfThisFile();
whenTheExtractorIsCalledForTheNextSetOfLocations();
assertTrue(theSelectedPoolsWere(allAvailablePools()));
}
@Test
public void shouldChooseAnyPoolWhenSourceWithNoConstraintsOnPoolWithHostTag()
throws CacheException {
givenNewFilesOnPoolsWithHostTags();
givenAReplicaOnlineFileWithNoTags();
givenTheSourceAndConstraintsOfThisFile();
whenTheExtractorIsCalledForTheNextSetOfLocations();
assertTrue(theSelectedPoolsWere(allAvailablePools()));
}
@Test
public void shouldChooseAnyPoolWhenSourceWithNoConstraintsOnPoolWithNoTags()
throws CacheException {
givenNewFilesOnPoolsWithNoTags();
givenAReplicaOnlineFileWithNoTags();
givenTheSourceAndConstraintsOfThisFile();
whenTheExtractorIsCalledForTheNextSetOfLocations();
assertTrue(theSelectedPoolsWere(allAvailablePools()));
}
@Test
public void shouldChooseAnyPoolWhenSourceWithRackConstraintOnPoolWithHostTag()
throws CacheException {
givenNewFilesOnPoolsWithHostTags();
givenAReplicaOnlineFileWithRackTag();
givenTheSourceAndConstraintsOfThisFile();
whenTheExtractorIsCalledForTheNextSetOfLocations();
assertTrue(theSelectedPoolsWere(allAvailablePools()));
}
@Test
public void shouldChooseAnyPoolWhenSourceWithRackConstraintOnPoolWithNoTags()
throws CacheException {
givenNewFilesOnPoolsWithNoTags();
givenAReplicaOnlineFileWithRackTag();
givenTheSourceAndConstraintsOfThisFile();
whenTheExtractorIsCalledForTheNextSetOfLocations();
assertTrue(theSelectedPoolsWere(allAvailablePools()));
}
@Test
public void shouldChoosePoolOnDifferentHostAndRackWhenSourceWithBothConstraintsOnPoolWithBothTags()
throws CacheException {
givenNewFilesOnPoolsWithHostAndRackTags();
givenAReplicaOnlineFileWithBothTags();
givenTheSourceAndConstraintsOfThisFile();
whenTheExtractorIsCalledForTheNextSetOfLocations();
assertTrue(theSelectedPoolsWere(
allPoolsNotOnSameHostAndRackAsSource()));
}
@Test
public void shouldChoosePoolOnDifferentHostWhenSourceWithBothConstraintsOnPoolWithHostTag()
throws CacheException {
givenNewFilesOnPoolsWithHostTags();
givenAReplicaOnlineFileWithBothTags();
givenTheSourceAndConstraintsOfThisFile();
whenTheExtractorIsCalledForTheNextSetOfLocations();
assertTrue(theSelectedPoolsWere(allPoolsNotOnSameHostAsSource()));
}
@Test
public void shouldChoosePoolOnDifferentHostWhenSourceWithHostConstraintOnPoolWithBothTags()
throws CacheException {
givenNewFilesOnPoolsWithHostAndRackTags();
givenAReplicaOnlineFileWithHostTag();
givenTheSourceAndConstraintsOfThisFile();
whenTheExtractorIsCalledForTheNextSetOfLocations();
assertTrue(theSelectedPoolsWere(allPoolsNotOnSameHostAsSource()));
}
@Test
public void shouldChoosePoolOnDifferentHostWhenSourceWithHostConstraintOnPoolWithHostTag()
throws CacheException {
givenNewFilesOnPoolsWithHostTags();
givenAReplicaOnlineFileWithHostTag();
givenTheSourceAndConstraintsOfThisFile();
whenTheExtractorIsCalledForTheNextSetOfLocations();
assertTrue(theSelectedPoolsWere(allPoolsNotOnSameHostAsSource()));
}
@Test
public void shouldChoosePoolOnDifferentRackWhenSourceWithRackConstraintOnPoolWithBothTags()
throws CacheException {
givenNewFilesOnPoolsWithHostAndRackTags();
givenAReplicaOnlineFileWithRackTag();
givenTheSourceAndConstraintsOfThisFile();
whenTheExtractorIsCalledForTheNextSetOfLocations();
assertTrue(theSelectedPoolsWere(allPoolsNotOnSameRackAsSource()));
}
@Test
public void shouldNotFindAnyAvailablePoolIfFileIsOverconstrained()
throws CacheException {
givenFilesWithExcessLocations();
givenAReplicaOnlineFileWithBothTags();
givenTheSourceAndConstraintsOfThisFile();
givenAllTaglessPoolsAreOffline();
offlinePools("resilient_pool-9");
whenTheExtractorIsCalledForTheNextSetOfLocations();
assertTrue(theSelectedPoolsWere(noneAvailable()));
}
private Collection<String> allAvailablePools() {
return memberPools().stream()
.map((i) -> poolInfoMap.getPool(i))
.filter((p) -> poolInfoMap.getPoolState(pool).mode.isEnabled())
.collect(Collectors.toSet());
}
private Collection<String> allPoolsNotOnSameHostAndRackAsSource() {
return filterPools("hostname", "rack");
}
private Collection<String> allPoolsNotOnSameHostAsSource() {
return filterPools("hostname");
}
private Collection<String> allPoolsNotOnSameRackAsSource() {
return filterPools("rack");
}
private Collection<String> filterPools(String... constraints) {
Map<String, String> sourceTags = poolInfoMap.getTags(
poolInfoMap.getPoolIndex(pool));
return memberPools().stream().filter((p) -> {
Map<String, String> tags = poolInfoMap.getTags(p);
if (tags.isEmpty()) {
return true;
}
for (String key : constraints) {
if (tags.containsKey(key) && sourceTags.containsKey(key)
&& tags.get(key).equals(sourceTags.get(key))) {
return false;
}
}
return true;
}).map((i) -> poolInfoMap.getPool(i)).collect(Collectors.toSet());
}
private void givenAReplicaOnlineFileWithBothTags() throws CacheException {
attributes = aReplicaOnlineFileWithBothTags();
}
private void givenAReplicaOnlineFileWithHostTag() throws CacheException {
attributes = aReplicaOnlineFileWithHostTag();
}
private void givenAReplicaOnlineFileWithNoTags() throws CacheException {
attributes = aReplicaOnlineFileWithNoTags();
}
private void givenAReplicaOnlineFileWithRackTag() throws CacheException {
attributes = aReplicaOnlineFileWithRackTag();
}
private void givenAllTaglessPoolsAreOffline() {
Collection<String> offline = memberPools().stream().filter(
(pool) -> poolInfoMap.getTags(pool).isEmpty()).map(
(i) -> poolInfoMap.getPool(i)).collect(
Collectors.toList());
offlinePools(offline.toArray(new String[0]));
}
private void givenFilesWithExcessLocations() {
loadFilesWithExcessLocations();
}
private void givenNewFilesOnPoolsWithHostAndRackTags() {
loadNewFilesOnPoolsWithHostAndRackTags();
}
private void givenNewFilesOnPoolsWithHostTags() {
loadNewFilesOnPoolsWithHostTags();
}
private void givenNewFilesOnPoolsWithNoTags() {
loadNewFilesOnPoolsWithNoTags();
}
private void givenTheSourceAndConstraintsOfThisFile() {
pool = attributes.getLocations().iterator().next();
String storageGroupName = attributes.getStorageClass() + "@"
+ attributes.getHsm();
Integer sindex = poolInfoMap.getUnitIndex(storageGroupName);
StorageUnitConstraints constraints = poolInfoMap.getStorageUnitConstraints(sindex);
extractor = new CopyLocationExtractor(constraints.getOneCopyPer(),
poolInfoMap);
}
private Collection<Integer> memberPools() {
return poolInfoMap.getPoolsOfGroup(poolInfoMap.getResilientPoolGroup(
poolInfoMap.getPoolIndex(pool)));
}
private Collection<String> noneAvailable() {
return Collections.EMPTY_SET;
}
private boolean theSelectedPoolsWere(Collection<String> pools) {
for (String pool : pools) {
if (!selected.contains(pool)) {
return false;
}
}
for (String pool : selected) {
if (!pools.contains(pool)) {
return false;
}
}
return true;
}
private void whenTheExtractorIsCalledForTheNextSetOfLocations() {
attributes.getLocations().stream().forEach(
(p) -> extractor.addSeenTagsFor(p));
selected = extractor.getCandidateLocations(allAvailablePools());
}
}