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[Improvement][server] Fix some sonar analyzed bugs (#3415) 

* [FIX_BUG][*]fix sonar bugs
fix assert error(assertions always pass)

* fix assert error(assertions always pass)
insert data should judging the success status

* fix assert error(assertions always pass)

* use AtomicReference<Object> to replace unsafe volatile Object

* use AtomicReference<Object> to replace unsafe volatile Object

* lazy initialization holder class Singleton...

* reformat code
judge database operations

* reformat code
judge database operations

* revert

* use ThreadLocalRandom to build random numbers

* reform code

* fix dao test error

* judge database operations
pull/3/MERGE
CalvinKirs 4 years ago committed by GitHub
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056168fc32
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a1ce54b8e6
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5 changed files with 123 additions and 82 deletions
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  1. 75
      dolphinscheduler-dao/src/test/java/org/apache/dolphinscheduler/dao/mapper/AccessTokenMapperTest.java
  2. 85
      dolphinscheduler-dao/src/test/java/org/apache/dolphinscheduler/dao/mapper/ResourceMapperTest.java
  3. 21
      dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/master/future/TaskFuture.java
  4. 1
      dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/master/processor/queue/TaskResponseService.java
  5. 23
      dolphinscheduler-service/src/main/java/org/apache/dolphinscheduler/service/quartz/QuartzExecutors.java

75
dolphinscheduler-dao/src/test/java/org/apache/dolphinscheduler/dao/mapper/AccessTokenMapperTest.java
Unescape View File

@ -34,6 +34,7 @@ import org.springframework.transaction.annotation.Transactional;
import javax.annotation.Resource; import javax.annotation.Resource;
import java.text.SimpleDateFormat; import java.text.SimpleDateFormat;
import java.util.*; import java.util.*;
import java.util.concurrent.ThreadLocalRandom;
import static org.hamcrest.MatcherAssert.assertThat; import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.greaterThan; import static org.hamcrest.Matchers.greaterThan;
@ -45,7 +46,7 @@ import static org.junit.Assert.*;
@RunWith(SpringRunner.class) @RunWith(SpringRunner.class)
@SpringBootTest @SpringBootTest
@Transactional @Transactional
@Rollback(true) @Rollback
public class AccessTokenMapperTest { public class AccessTokenMapperTest {
@Autowired @Autowired
@ -56,10 +57,11 @@ public class AccessTokenMapperTest {
/** /**
* test insert * test insert
*
* @throws Exception * @throws Exception
*/ */
@Test @Test
public void testInsert() throws Exception{ public void testInsert() throws Exception {
Integer userId = 1; Integer userId = 1;
AccessToken accessToken = createAccessToken(userId); AccessToken accessToken = createAccessToken(userId);
@ -69,10 +71,11 @@ public class AccessTokenMapperTest {
/** /**
* test select by id * test select by id
*
* @throws Exception * @throws Exception
*/ */
@Test @Test
public void testSelectById() throws Exception{ public void testSelectById() throws Exception {
Integer userId = 1; Integer userId = 1;
AccessToken accessToken = createAccessToken(userId); AccessToken accessToken = createAccessToken(userId);
AccessToken resultAccessToken = accessTokenMapper.selectById(accessToken.getId()); AccessToken resultAccessToken = accessTokenMapper.selectById(accessToken.getId());
@ -81,6 +84,7 @@ public class AccessTokenMapperTest {
/** /**
* test hashCode method * test hashCode method
*
* @throws Exception * @throws Exception
*/ */
@Test @Test
@ -94,6 +98,7 @@ public class AccessTokenMapperTest {
/** /**
* test equals method * test equals method
*
* @throws Exception * @throws Exception
*/ */
@Test @Test
@ -108,7 +113,7 @@ public class AccessTokenMapperTest {
* test page * test page
*/ */
@Test @Test
public void testSelectAccessTokenPage() throws Exception{ public void testSelectAccessTokenPage() throws Exception {
Integer count = 4; Integer count = 4;
String userName = "zhangsan"; String userName = "zhangsan";
@ -120,11 +125,11 @@ public class AccessTokenMapperTest {
Page page = new Page(offset, size); Page page = new Page(offset, size);
IPage<AccessToken> accessTokenPage = accessTokenMapper.selectAccessTokenPage(page, userName, 0); IPage<AccessToken> accessTokenPage = accessTokenMapper.selectAccessTokenPage(page, userName, 0);
assertEquals(Integer.valueOf(accessTokenPage.getRecords().size()),size); assertEquals(Integer.valueOf(accessTokenPage.getRecords().size()), size);
for (AccessToken accessToken : accessTokenPage.getRecords()){ for (AccessToken accessToken : accessTokenPage.getRecords()) {
AccessToken resultAccessToken = accessTokenMap.get(accessToken.getId()); AccessToken resultAccessToken = accessTokenMap.get(accessToken.getId());
assertEquals(accessToken,resultAccessToken); assertEquals(accessToken, resultAccessToken);
} }
} }
@ -133,14 +138,17 @@ public class AccessTokenMapperTest {
* test update * test update
*/ */
@Test @Test
public void testUpdate() throws Exception{ public void testUpdate() throws Exception {
Integer userId = 1; Integer userId = 1;
AccessToken accessToken = createAccessToken(userId); AccessToken accessToken = createAccessToken(userId);
//update //update
accessToken.setToken("56789"); accessToken.setToken("56789");
accessToken.setExpireTime(DateUtils.getCurrentDate()); accessToken.setExpireTime(DateUtils.getCurrentDate());
accessToken.setUpdateTime(DateUtils.getCurrentDate()); accessToken.setUpdateTime(DateUtils.getCurrentDate());
accessTokenMapper.updateById(accessToken); int status = accessTokenMapper.updateById(accessToken);
if (status != 1) {
Assert.fail("update access token fail");
}
AccessToken resultAccessToken = accessTokenMapper.selectById(accessToken.getId()); AccessToken resultAccessToken = accessTokenMapper.selectById(accessToken.getId());
assertEquals(accessToken, resultAccessToken); assertEquals(accessToken, resultAccessToken);
} }
@ -149,11 +157,14 @@ public class AccessTokenMapperTest {
* test delete * test delete
*/ */
@Test @Test
public void testDelete() throws Exception{ public void testDelete() throws Exception {
Integer userId = 1; Integer userId = 1;
AccessToken accessToken = createAccessToken(userId); AccessToken accessToken = createAccessToken(userId);
accessTokenMapper.deleteById(accessToken.getId()); int status = accessTokenMapper.deleteById(accessToken.getId());
if (status != 1) {
Assert.fail("delete access token data fail");
}
AccessToken resultAccessToken = AccessToken resultAccessToken =
accessTokenMapper.selectById(accessToken.getId()); accessTokenMapper.selectById(accessToken.getId());
@ -163,21 +174,22 @@ public class AccessTokenMapperTest {
/** /**
* create accessTokens * create accessTokens
* @param count create accessToken count *
* @param count create accessToken count
* @param userName username * @param userName username
* @return accessToken map * @return accessToken map
* @throws Exception * @throws Exception
*/ */
private Map<Integer,AccessToken> createAccessTokens( private Map<Integer, AccessToken> createAccessTokens(
Integer count,String userName) throws Exception{ Integer count, String userName) throws Exception {
User user = createUser(userName); User user = createUser(userName);
Map<Integer,AccessToken> accessTokenMap = new HashMap<>(); Map<Integer, AccessToken> accessTokenMap = new HashMap<>();
for (int i = 1 ; i<= count ; i++){ for (int i = 1; i <= count; i++) {
AccessToken accessToken = createAccessToken(user.getId(),userName); AccessToken accessToken = createAccessToken(user.getId(), userName);
accessTokenMap.put(accessToken.getId(),accessToken); accessTokenMap.put(accessToken.getId(), accessToken);
} }
return accessTokenMap; return accessTokenMap;
@ -185,11 +197,12 @@ public class AccessTokenMapperTest {
/** /**
* create user * create user
*
* @param userName userName * @param userName userName
* @return user * @return user
* @throws Exception * @throws Exception
*/ */
private User createUser(String userName) throws Exception{ private User createUser(String userName) throws Exception {
User user = new User(); User user = new User();
user.setUserName(userName); user.setUserName(userName);
user.setUserPassword("123"); user.setUserPassword("123");
@ -201,42 +214,50 @@ public class AccessTokenMapperTest {
user.setUpdateTime(DateUtils.getCurrentDate()); user.setUpdateTime(DateUtils.getCurrentDate());
user.setQueue("default"); user.setQueue("default");
userMapper.insert(user); int status = userMapper.insert(user);
if (status != 1) {
Assert.fail("insert user data error");
}
return user; return user;
} }
/** /**
* create access token * create access token
* @param userId userId *
* @param userId userId
* @param userName userName * @param userName userName
* @return accessToken * @return accessToken
* @throws Exception * @throws Exception
*/ */
private AccessToken createAccessToken(Integer userId,String userName)throws Exception{ private AccessToken createAccessToken(Integer userId, String userName) throws Exception {
Random random = new Random();
//insertOne //insertOne
AccessToken accessToken = new AccessToken(); AccessToken accessToken = new AccessToken();
accessToken.setUserName(userName); accessToken.setUserName(userName);
accessToken.setUserId(userId); accessToken.setUserId(userId);
accessToken.setToken(String.valueOf(random.nextLong())); accessToken.setToken(String.valueOf(ThreadLocalRandom.current().nextLong()));
accessToken.setCreateTime(DateUtils.getCurrentDate()); accessToken.setCreateTime(DateUtils.getCurrentDate());
accessToken.setUpdateTime(DateUtils.getCurrentDate()); accessToken.setUpdateTime(DateUtils.getCurrentDate());
accessToken.setExpireTime(DateUtils.getCurrentDate()); accessToken.setExpireTime(DateUtils.getCurrentDate());
accessTokenMapper.insert(accessToken); int status = accessTokenMapper.insert(accessToken);
if (status != 1) {
Assert.fail("insert data error");
}
return accessToken; return accessToken;
} }
/** /**
* create access token * create access token
*
* @param userId userId * @param userId userId
* @return accessToken * @return accessToken
* @throws Exception * @throws Exception
*/ */
private AccessToken createAccessToken(Integer userId)throws Exception{ private AccessToken createAccessToken(Integer userId) throws Exception {
return createAccessToken(userId,null); return createAccessToken(userId, null);
} }
} }

85
dolphinscheduler-dao/src/test/java/org/apache/dolphinscheduler/dao/mapper/ResourceMapperTest.java
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@ -65,9 +65,10 @@ public class ResourceMapperTest {
/** /**
* insert * insert
*
* @return Resource * @return Resource
*/ */
private Resource insertOne(){ private Resource insertOne() {
//insertOne //insertOne
Resource resource = new Resource(); Resource resource = new Resource();
resource.setAlias("ut-resource"); resource.setAlias("ut-resource");
@ -76,16 +77,20 @@ public class ResourceMapperTest {
resource.setDirectory(false); resource.setDirectory(false);
resource.setType(ResourceType.FILE); resource.setType(ResourceType.FILE);
resource.setUserId(111); resource.setUserId(111);
resourceMapper.insert(resource); int status = resourceMapper.insert(resource);
if (status != 1) {
Assert.fail("insert data error");
}
return resource; return resource;
} }
/** /**
* create resource by user * create resource by user
*
* @param user user * @param user user
* @return Resource * @return Resource
*/ */
private Resource createResource(User user,boolean isDirectory,ResourceType resourceType,int pid,String alias,String fullName){ private Resource createResource(User user, boolean isDirectory, ResourceType resourceType, int pid, String alias, String fullName) {
//insertOne //insertOne
Resource resource = new Resource(); Resource resource = new Resource();
resource.setDirectory(isDirectory); resource.setDirectory(isDirectory);
@ -93,19 +98,23 @@ public class ResourceMapperTest {
resource.setAlias(alias); resource.setAlias(alias);
resource.setFullName(fullName); resource.setFullName(fullName);
resource.setUserId(user.getId()); resource.setUserId(user.getId());
resourceMapper.insert(resource); int status = resourceMapper.insert(resource);
if (status != 1) {
Assert.fail("insert data error");
}
return resource; return resource;
} }
/** /**
* create resource by user * create resource by user
*
* @param user user * @param user user
* @return Resource * @return Resource
*/ */
private Resource createResource(User user){ private Resource createResource(User user) {
//insertOne //insertOne
String alias = String.format("ut-resource-%s",user.getUserName()); String alias = String.format("ut-resource-%s", user.getUserName());
String fullName = String.format("/%s",alias); String fullName = String.format("/%s", alias);
Resource resource = createResource(user, false, ResourceType.FILE, -1, alias, fullName); Resource resource = createResource(user, false, ResourceType.FILE, -1, alias, fullName);
return resource; return resource;
@ -113,9 +122,10 @@ public class ResourceMapperTest {
/** /**
* create user * create user
*
* @return User * @return User
*/ */
private User createGeneralUser(String userName){ private User createGeneralUser(String userName) {
User user = new User(); User user = new User();
user.setUserName(userName); user.setUserName(userName);
user.setUserPassword("1"); user.setUserPassword("1");
@ -124,15 +134,20 @@ public class ResourceMapperTest {
user.setCreateTime(new Date()); user.setCreateTime(new Date());
user.setTenantId(1); user.setTenantId(1);
user.setUpdateTime(new Date()); user.setUpdateTime(new Date());
userMapper.insert(user); int status = userMapper.insert(user);
if (status != 1) {
Assert.fail("insert data error");
}
return user; return user;
} }
/** /**
* create resource user * create resource user
*
* @return ResourcesUser * @return ResourcesUser
*/ */
private ResourcesUser createResourcesUser(Resource resource,User user){ private ResourcesUser createResourcesUser(Resource resource, User user) {
//insertOne //insertOne
ResourcesUser resourcesUser = new ResourcesUser(); ResourcesUser resourcesUser = new ResourcesUser();
resourcesUser.setCreateTime(new Date()); resourcesUser.setCreateTime(new Date());
@ -145,16 +160,17 @@ public class ResourceMapperTest {
} }
@Test @Test
public void testInsert(){ public void testInsert() {
Resource resource = insertOne(); Resource resource = insertOne();
assertNotNull(resource.getId()); assertNotNull(resource.getId());
assertThat(resource.getId(),greaterThan(0)); assertThat(resource.getId(), greaterThan(0));
} }
/** /**
* test update * test update
*/ */
@Test @Test
public void testUpdate(){ public void testUpdate() {
//insertOne //insertOne
Resource resource = insertOne(); Resource resource = insertOne();
resource.setCreateTime(new Date()); resource.setCreateTime(new Date());
@ -167,7 +183,7 @@ public class ResourceMapperTest {
* test delete * test delete
*/ */
@Test @Test
public void testDelete(){ public void testDelete() {
Resource resourceMap = insertOne(); Resource resourceMap = insertOne();
int delete = resourceMapper.deleteById(resourceMap.getId()); int delete = resourceMapper.deleteById(resourceMap.getId());
Assert.assertEquals(1, delete); Assert.assertEquals(1, delete);
@ -294,19 +310,31 @@ public class ResourceMapperTest {
Tenant tenant = new Tenant(); Tenant tenant = new Tenant();
tenant.setTenantName("ut tenant "); tenant.setTenantName("ut tenant ");
tenant.setTenantCode("ut tenant code for resource"); tenant.setTenantCode("ut tenant code for resource");
tenantMapper.insert(tenant); int tenantInsertStatus = tenantMapper.insert(tenant);
if (tenantInsertStatus != 1) {
Assert.fail("insert tenant data error");
}
User user = new User(); User user = new User();
user.setTenantId(tenant.getId()); user.setTenantId(tenant.getId());
user.setUserName("ut user"); user.setUserName("ut user");
userMapper.insert(user); int userInsertStatus = userMapper.insert(user);
if (userInsertStatus != 1) {
Assert.fail("insert user data error");
}
Resource resource = insertOne(); Resource resource = insertOne();
resource.setUserId(user.getId()); resource.setUserId(user.getId());
resourceMapper.updateById(resource); int userUpdateStatus = resourceMapper.updateById(resource);
if (userUpdateStatus != 1) {
Assert.fail("update user data error");
}
String resource1 = resourceMapper.queryTenantCodeByResourceName( String resource1 = resourceMapper.queryTenantCodeByResourceName(
resource.getFullName(),ResourceType.FILE.ordinal() resource.getFullName(), ResourceType.FILE.ordinal()
); );
@ -315,7 +343,7 @@ public class ResourceMapperTest {
} }
@Test @Test
public void testListAuthorizedResource(){ public void testListAuthorizedResource() {
// create a general user // create a general user
User generalUser1 = createGeneralUser("user1"); User generalUser1 = createGeneralUser("user1");
User generalUser2 = createGeneralUser("user2"); User generalUser2 = createGeneralUser("user2");
@ -328,20 +356,19 @@ public class ResourceMapperTest {
List<Resource> resources = resourceMapper.listAuthorizedResource(generalUser2.getId(), resNames); List<Resource> resources = resourceMapper.listAuthorizedResource(generalUser2.getId(), resNames);
Assert.assertEquals(generalUser2.getId(),resource.getUserId()); Assert.assertEquals(generalUser2.getId(), resource.getUserId());
Assert.assertFalse(resources.stream().map(t -> t.getFullName()).collect(toList()).containsAll(Arrays.asList(resNames))); Assert.assertFalse(resources.stream().map(t -> t.getFullName()).collect(toList()).containsAll(Arrays.asList(resNames)));
// authorize object unauthorizedResource to generalUser // authorize object unauthorizedResource to generalUser
createResourcesUser(unauthorizedResource,generalUser2); createResourcesUser(unauthorizedResource, generalUser2);
List<Resource> authorizedResources = resourceMapper.listAuthorizedResource(generalUser2.getId(), resNames); List<Resource> authorizedResources = resourceMapper.listAuthorizedResource(generalUser2.getId(), resNames);
Assert.assertTrue(authorizedResources.stream().map(t -> t.getFullName()).collect(toList()).containsAll(Arrays.asList(resNames))); Assert.assertTrue(authorizedResources.stream().map(t -> t.getFullName()).collect(toList()).containsAll(Arrays.asList(resNames)));
} }
@Test @Test
public void deleteIdsTest(){ public void deleteIdsTest() {
// create a general user // create a general user
User generalUser1 = createGeneralUser("user1"); User generalUser1 = createGeneralUser("user1");
@ -352,11 +379,11 @@ public class ResourceMapperTest {
resourceList.add(resource.getId()); resourceList.add(resource.getId());
resourceList.add(resource1.getId()); resourceList.add(resource1.getId());
int result = resourceMapper.deleteIds(resourceList.toArray(new Integer[resourceList.size()])); int result = resourceMapper.deleteIds(resourceList.toArray(new Integer[resourceList.size()]));
Assert.assertEquals(result,2); Assert.assertEquals(result, 2);
} }
@Test @Test
public void queryResourceListAuthoredTest(){ public void queryResourceListAuthoredTest() {
// create a general user // create a general user
User generalUser1 = createGeneralUser("user1"); User generalUser1 = createGeneralUser("user1");
User generalUser2 = createGeneralUser("user2"); User generalUser2 = createGeneralUser("user2");
@ -372,16 +399,18 @@ public class ResourceMapperTest {
} }
@Test @Test
public void batchUpdateResourceTest(){ public void batchUpdateResourceTest() {
// create a general user // create a general user
User generalUser1 = createGeneralUser("user1"); User generalUser1 = createGeneralUser("user1");
// create resource // create resource
Resource resource = createResource(generalUser1); Resource resource = createResource(generalUser1);
resource.setFullName(String.format("%s-update",resource.getFullName())); resource.setFullName(String.format("%s-update", resource.getFullName()));
resource.setUpdateTime(new Date()); resource.setUpdateTime(new Date());
List<Resource> resourceList = new ArrayList<>(); List<Resource> resourceList = new ArrayList<>();
resourceList.add(resource); resourceList.add(resource);
int result = resourceMapper.batchUpdateResource(resourceList); int result = resourceMapper.batchUpdateResource(resourceList);
Assert.assertTrue(result>0); if (result != resourceList.size()) {
Assert.fail("batch update resource data error");
}
} }
} }

21
dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/master/future/TaskFuture.java
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@ -28,6 +28,7 @@ import java.util.Map;
import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CountDownLatch; import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit; import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
/** /**
* task fulture * task fulture
@ -55,11 +56,11 @@ public class TaskFuture {
/** /**
* response command * response command
*/ */
private volatile Command responseCommand; private AtomicReference<Command> responseCommandReference = new AtomicReference<>();
private volatile boolean sendOk = true; private volatile boolean sendOk = true;
private volatile Throwable cause; private AtomicReference<Throwable> causeReference;
public TaskFuture(long opaque, long timeoutMillis) { public TaskFuture(long opaque, long timeoutMillis) {
this.opaque = opaque; this.opaque = opaque;
@ -74,7 +75,7 @@ public class TaskFuture {
*/ */
public Command waitResponse() throws InterruptedException { public Command waitResponse() throws InterruptedException {
this.latch.await(timeoutMillis, TimeUnit.MILLISECONDS); this.latch.await(timeoutMillis, TimeUnit.MILLISECONDS);
return this.responseCommand; return this.responseCommandReference.get();
} }
/** /**
@ -83,7 +84,7 @@ public class TaskFuture {
* @param responseCommand responseCommand * @param responseCommand responseCommand
*/ */
public void putResponse(final Command responseCommand) { public void putResponse(final Command responseCommand) {
this.responseCommand = responseCommand; responseCommandReference.set(responseCommand);
this.latch.countDown(); this.latch.countDown();
FUTURE_TABLE.remove(opaque); FUTURE_TABLE.remove(opaque);
} }
@ -114,11 +115,11 @@ public class TaskFuture {
} }
public void setCause(Throwable cause) { public void setCause(Throwable cause) {
this.cause = cause; causeReference.set(cause);
} }
public Throwable getCause() { public Throwable getCause() {
return cause; return causeReference.get();
} }
public long getOpaque() { public long getOpaque() {
@ -134,11 +135,11 @@ public class TaskFuture {
} }
public Command getResponseCommand() { public Command getResponseCommand() {
return responseCommand; return responseCommandReference.get();
} }
public void setResponseCommand(Command responseCommand) { public void setResponseCommand(Command responseCommand) {
this.responseCommand = responseCommand; responseCommandReference.set(responseCommand);
} }
@ -166,9 +167,9 @@ public class TaskFuture {
", timeoutMillis=" + timeoutMillis + ", timeoutMillis=" + timeoutMillis +
", latch=" + latch + ", latch=" + latch +
", beginTimestamp=" + beginTimestamp + ", beginTimestamp=" + beginTimestamp +
", responseCommand=" + responseCommand + ", responseCommand=" + responseCommandReference.get() +
", sendOk=" + sendOk + ", sendOk=" + sendOk +
", cause=" + cause + ", cause=" + causeReference.get() +
'}'; '}';
} }
} }

1
dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/master/processor/queue/TaskResponseService.java
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@ -108,6 +108,7 @@ public class TaskResponseService {
TaskResponseEvent taskResponseEvent = eventQueue.take(); TaskResponseEvent taskResponseEvent = eventQueue.take();
persist(taskResponseEvent); persist(taskResponseEvent);
} catch (InterruptedException e){ } catch (InterruptedException e){
Thread.currentThread().interrupt();
break; break;
} catch (Exception e){ } catch (Exception e){
logger.error("persist task error",e); logger.error("persist task error",e);

23
dolphinscheduler-service/src/main/java/org/apache/dolphinscheduler/service/quartz/QuartzExecutors.java
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@ -61,20 +61,20 @@ public class QuartzExecutors {
*/ */
private static Scheduler scheduler; private static Scheduler scheduler;
/**
* instance of QuartzExecutors
*/
private static volatile QuartzExecutors INSTANCE = null;
/** /**
* load conf * load conf
*/ */
private static Configuration conf; private static Configuration conf;
private static final class Holder {
private static final QuartzExecutors instance = new QuartzExecutors();
}
private QuartzExecutors() { private QuartzExecutors() {
try { try {
conf = new PropertiesConfiguration(QUARTZ_PROPERTIES_PATH); conf = new PropertiesConfiguration(QUARTZ_PROPERTIES_PATH);
init();
}catch (ConfigurationException e){ }catch (ConfigurationException e){
logger.warn("not loaded quartz configuration file, will used default value",e); logger.warn("not loaded quartz configuration file, will used default value",e);
} }
@ -85,18 +85,7 @@ public class QuartzExecutors {
* @return instance of Quartz Executors * @return instance of Quartz Executors
*/ */
public static QuartzExecutors getInstance() { public static QuartzExecutors getInstance() {
if (INSTANCE == null) { return Holder.instance;
synchronized (QuartzExecutors.class) {
// when more than two threads run into the first null check same time, to avoid instanced more than one time, it needs to be checked again.
if (INSTANCE == null) {
QuartzExecutors quartzExecutors = new QuartzExecutors();
//finish QuartzExecutors init
quartzExecutors.init();
INSTANCE = quartzExecutors;
}
}
}
return INSTANCE;
} }

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