diff --git a/pom.xml b/pom.xml
index f143fd31..819389e3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -18,7 +18,7 @@
jar
- 1.2-rc1
+ 1.2.1-SNAPSHOT
${sebserver-version}
${sebserver-version}
UTF-8
diff --git a/src/main/java/ch/ethz/seb/sebserver/webservice/datalayer/batis/ClientEventLastPingMapper.java b/src/main/java/ch/ethz/seb/sebserver/webservice/datalayer/batis/ClientEventLastPingMapper.java
index cf233e83..6fdaadb8 100644
--- a/src/main/java/ch/ethz/seb/sebserver/webservice/datalayer/batis/ClientEventLastPingMapper.java
+++ b/src/main/java/ch/ethz/seb/sebserver/webservice/datalayer/batis/ClientEventLastPingMapper.java
@@ -8,6 +8,9 @@
package ch.ethz.seb.sebserver.webservice.datalayer.batis;
+import static ch.ethz.seb.sebserver.webservice.datalayer.batis.mapper.ClientEventRecordDynamicSqlSupport.*;
+import static org.mybatis.dynamic.sql.SqlBuilder.isEqualTo;
+
import java.util.Collection;
import org.apache.ibatis.annotations.Arg;
@@ -15,39 +18,85 @@ import org.apache.ibatis.annotations.ConstructorArgs;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.ResultType;
import org.apache.ibatis.annotations.SelectProvider;
+import org.apache.ibatis.annotations.UpdateProvider;
import org.apache.ibatis.type.JdbcType;
import org.mybatis.dynamic.sql.select.MyBatis3SelectModelAdapter;
import org.mybatis.dynamic.sql.select.QueryExpressionDSL;
import org.mybatis.dynamic.sql.select.SelectDSL;
import org.mybatis.dynamic.sql.select.render.SelectStatementProvider;
+import org.mybatis.dynamic.sql.update.UpdateDSL;
+import org.mybatis.dynamic.sql.update.render.UpdateStatementProvider;
import org.mybatis.dynamic.sql.util.SqlProviderAdapter;
+import ch.ethz.seb.sebserver.gbl.model.session.ClientEvent.EventType;
import ch.ethz.seb.sebserver.webservice.datalayer.batis.mapper.ClientEventRecordDynamicSqlSupport;
@Mapper
public interface ClientEventLastPingMapper {
@SelectProvider(type = SqlProviderAdapter.class, method = "select")
- Long num(SelectStatementProvider selectStatement);
+ @ConstructorArgs({ @Arg(column = "server_time", javaType = Long.class, jdbcType = JdbcType.BIGINT) })
+ Collection selectPingTimes(SelectStatementProvider selectStatement);
+
+ @SelectProvider(type = SqlProviderAdapter.class, method = "select")
+ @ConstructorArgs({ @Arg(column = "server_time", javaType = Long.class, jdbcType = JdbcType.BIGINT) })
+ Long selectPingTime(SelectStatementProvider selectStatement);
+
+ @SelectProvider(type = SqlProviderAdapter.class, method = "select")
+ @ConstructorArgs({ @Arg(column = "id", javaType = Long.class, jdbcType = JdbcType.BIGINT, id = true) })
+ Long selectPK(SelectStatementProvider selectStatement);
+
+ @UpdateProvider(type = SqlProviderAdapter.class, method = "update")
+ int update(UpdateStatementProvider updateStatement);
@SelectProvider(type = SqlProviderAdapter.class, method = "select")
@ResultType(ClientEventLastPingRecord.class)
@ConstructorArgs({
@Arg(column = "id", javaType = Long.class, jdbcType = JdbcType.BIGINT),
- @Arg(column = "server_time", javaType = Long.class, jdbcType = JdbcType.BIGINT),
+ @Arg(column = "server_time", javaType = Long.class, jdbcType = JdbcType.BIGINT)
})
Collection selectMany(SelectStatementProvider select);
+ default Long selectPingTimeByPrimaryKey(final Long id_) {
+ return SelectDSL.selectWithMapper(
+ this::selectPingTime,
+ ClientEventRecordDynamicSqlSupport.serverTime.as("server_time"))
+ .from(ClientEventRecordDynamicSqlSupport.clientEventRecord)
+ .where(ClientEventRecordDynamicSqlSupport.id, isEqualTo(id_))
+ .build()
+ .execute();
+ }
+
+ default Long pingRecordIdByConnectionId(final Long connectionId) {
+ return SelectDSL.selectDistinctWithMapper(
+ this::selectPK,
+ ClientEventRecordDynamicSqlSupport.id.as("id"))
+ .from(ClientEventRecordDynamicSqlSupport.clientEventRecord)
+ .where(ClientEventRecordDynamicSqlSupport.clientConnectionId, isEqualTo(connectionId))
+ .and(ClientEventRecordDynamicSqlSupport.type, isEqualTo(EventType.LAST_PING.id))
+ .build()
+ .execute();
+ }
+
default QueryExpressionDSL>> selectByExample() {
+
return SelectDSL.selectWithMapper(
this::selectMany,
- ClientEventRecordDynamicSqlSupport.clientConnectionId.as("id"),
+ ClientEventRecordDynamicSqlSupport.id.as("id"),
ClientEventRecordDynamicSqlSupport.serverTime.as("server_time"))
.from(ClientEventRecordDynamicSqlSupport.clientEventRecord);
}
+ default int updatePingTime(final Long _id, final Long pingTime) {
+ return UpdateDSL.updateWithMapper(this::update, clientEventRecord)
+ .set(serverTime).equalTo(pingTime)
+ .where(id, isEqualTo(_id))
+ .build()
+ .execute();
+ }
+
final class ClientEventLastPingRecord {
public final Long id;
diff --git a/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/dao/impl/ClientEventDAOImpl.java b/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/dao/impl/ClientEventDAOImpl.java
index 1d07897b..7c4b583a 100644
--- a/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/dao/impl/ClientEventDAOImpl.java
+++ b/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/dao/impl/ClientEventDAOImpl.java
@@ -18,6 +18,7 @@ import java.util.Set;
import java.util.function.Predicate;
import java.util.stream.Collectors;
+import org.joda.time.DateTimeUtils;
import org.mybatis.dynamic.sql.SqlBuilder;
import org.springframework.context.annotation.Lazy;
import org.springframework.stereotype.Component;
@@ -312,21 +313,6 @@ public class ClientEventDAOImpl implements ClientEventDAO {
.stream()
.map(pk -> new EntityKey(String.valueOf(pk), EntityType.CLIENT_EVENT))
.collect(Collectors.toList());
-
-// return all
-// .stream()
-// .map(EntityKey::getModelId)
-// .map(Long::parseLong)
-// .map(pk -> {
-// final int deleted = this.clientEventRecordMapper.deleteByPrimaryKey(pk);
-// if (deleted == 1) {
-// return new EntityKey(String.valueOf(pk), EntityType.CLIENT_EVENT);
-// } else {
-// return null;
-// }
-// })
-// .filter(Objects::nonNull)
-// .collect(Collectors.toList());
});
}
@@ -345,7 +331,7 @@ public class ClientEventDAOImpl implements ClientEventDAO {
return lastPingRec.get(0);
}
- final long millisecondsNow = Utils.getMillisecondsNow();
+ final long millisecondsNow = DateTimeUtils.currentTimeMillis();
final ClientEventRecord clientEventRecord = new ClientEventRecord();
clientEventRecord.setClientConnectionId(connectionId);
clientEventRecord.setType(EventType.LAST_PING.id);
diff --git a/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/session/impl/SEBClientConnectionServiceImpl.java b/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/session/impl/SEBClientConnectionServiceImpl.java
index c996e4a0..a056b7d9 100644
--- a/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/session/impl/SEBClientConnectionServiceImpl.java
+++ b/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/session/impl/SEBClientConnectionServiceImpl.java
@@ -45,6 +45,7 @@ import ch.ethz.seb.sebserver.webservice.servicelayer.session.ExamSessionService;
import ch.ethz.seb.sebserver.webservice.servicelayer.session.SEBClientConnectionService;
import ch.ethz.seb.sebserver.webservice.servicelayer.session.SEBClientInstructionService;
import ch.ethz.seb.sebserver.webservice.servicelayer.session.SEBClientNotificationService;
+import ch.ethz.seb.sebserver.webservice.servicelayer.session.impl.indicator.DistributedPingCache;
import ch.ethz.seb.sebserver.webservice.weblayer.api.APIConstraintViolationException;
@Lazy
@@ -71,6 +72,7 @@ public class SEBClientConnectionServiceImpl implements SEBClientConnectionServic
private final SEBClientNotificationService sebClientNotificationService;
private final WebserviceInfo webserviceInfo;
private final ExamAdminService examAdminService;
+ private final DistributedPingCache distributedPingCache;
protected SEBClientConnectionServiceImpl(
final ExamSessionService examSessionService,
@@ -79,7 +81,8 @@ public class SEBClientConnectionServiceImpl implements SEBClientConnectionServic
final SEBClientConfigDAO sebClientConfigDAO,
final SEBClientInstructionService sebInstructionService,
final SEBClientNotificationService sebClientNotificationService,
- final ExamAdminService examAdminService) {
+ final ExamAdminService examAdminService,
+ final DistributedPingCache distributedPingCache) {
this.examSessionService = examSessionService;
this.examSessionCacheService = examSessionService.getExamSessionCacheService();
@@ -91,6 +94,7 @@ public class SEBClientConnectionServiceImpl implements SEBClientConnectionServic
this.sebClientNotificationService = sebClientNotificationService;
this.webserviceInfo = sebInstructionService.getWebserviceInfo();
this.examAdminService = examAdminService;
+ this.distributedPingCache = distributedPingCache;
}
@Override
@@ -453,6 +457,12 @@ public class SEBClientConnectionServiceImpl implements SEBClientConnectionServic
updatedClientConnection = clientConnection;
}
+ // delete stored ping if this is a distributed setup
+ if (this.webserviceInfo.isDistributed()) {
+ this.distributedPingCache
+ .deletePingForConnection(updatedClientConnection.id);
+ }
+
reloadConnectionCache(connectionToken);
return updatedClientConnection;
});
@@ -501,6 +511,12 @@ public class SEBClientConnectionServiceImpl implements SEBClientConnectionServic
updatedClientConnection = clientConnection;
}
+ // delete stored ping if this is a distributed setup
+ if (this.webserviceInfo.isDistributed()) {
+ this.distributedPingCache
+ .deletePingForConnection(updatedClientConnection.id);
+ }
+
reloadConnectionCache(connectionToken);
return updatedClientConnection;
});
@@ -510,6 +526,7 @@ public class SEBClientConnectionServiceImpl implements SEBClientConnectionServic
public void updatePingEvents() {
try {
+ final boolean distributed = this.webserviceInfo.isDistributed();
final Cache cache = this.cacheManager.getCache(ExamSessionCacheService.CACHE_NAME_ACTIVE_CLIENT_CONNECTION);
final long now = Utils.getMillisecondsNow();
final Consumer missingPingUpdate = missingPingUpdate(now);
@@ -518,7 +535,7 @@ public class SEBClientConnectionServiceImpl implements SEBClientConnectionServic
.allRunningExamIds()
.getOrThrow()
.stream()
- .flatMap(examId -> (this.webserviceInfo.isDistributed())
+ .flatMap(examId -> distributed
? this.clientConnectionDAO
.getConnectionTokensNoCache(examId)
.getOrThrow()
diff --git a/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/session/impl/indicator/AbstractPingIndicator.java b/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/session/impl/indicator/AbstractPingIndicator.java
index 18a5bff0..754232ff 100644
--- a/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/session/impl/indicator/AbstractPingIndicator.java
+++ b/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/session/impl/indicator/AbstractPingIndicator.java
@@ -20,7 +20,6 @@ import ch.ethz.seb.sebserver.gbl.Constants;
import ch.ethz.seb.sebserver.gbl.model.exam.Indicator;
import ch.ethz.seb.sebserver.gbl.model.session.ClientEvent.EventType;
import ch.ethz.seb.sebserver.webservice.datalayer.batis.model.ClientEventRecord;
-import ch.ethz.seb.sebserver.webservice.servicelayer.dao.ClientEventDAO;
public abstract class AbstractPingIndicator extends AbstractClientIndicator {
@@ -28,14 +27,15 @@ public abstract class AbstractPingIndicator extends AbstractClientIndicator {
private final Set EMPTY_SET = Collections.unmodifiableSet(EnumSet.noneOf(EventType.class));
- protected final ClientEventDAO clientEventDAO;
+ protected final DistributedPingCache distributedPingCache;
- private long lastUpdate = 0;
- protected ClientEventRecord pingRecord = null;
+ private final long lastUpdate = 0;
+ protected Long pingRecord = null;
+
+ protected AbstractPingIndicator(final DistributedPingCache distributedPingCache) {
- protected AbstractPingIndicator(final ClientEventDAO clientEventDAO) {
super();
- this.clientEventDAO = clientEventDAO;
+ this.distributedPingCache = distributedPingCache;
}
@Override
@@ -47,10 +47,12 @@ public abstract class AbstractPingIndicator extends AbstractClientIndicator {
super.init(indicatorDefinition, connectionId, active, cachingEnabled);
- if (!this.cachingEnabled) {
- this.pingRecord = this.clientEventDAO
- .initPingEvent(this.connectionId)
- .getOr(null);
+ if (!this.cachingEnabled && this.active) {
+ this.pingRecord = this.distributedPingCache.initPingForConnection(this.connectionId);
+ if (this.pingRecord == null) {
+ // try once again
+ this.pingRecord = this.distributedPingCache.initPingForConnection(this.connectionId);
+ }
}
}
@@ -64,10 +66,7 @@ public abstract class AbstractPingIndicator extends AbstractClientIndicator {
// Update last ping time on persistent storage
final long millisecondsNow = DateTimeUtils.currentTimeMillis();
if (millisecondsNow - this.lastUpdate > INTERVAL_FOR_PERSISTENT_UPDATE) {
- this.pingRecord.setClientTime(timestamp);
- this.pingRecord.setServerTime(millisecondsNow);
- this.clientEventDAO.updatePingEvent(this.pingRecord);
- this.lastUpdate = millisecondsNow;
+ this.distributedPingCache.updatePing(this.pingRecord, millisecondsNow);
}
}
}
diff --git a/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/session/impl/indicator/DistributedPingCache.java b/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/session/impl/indicator/DistributedPingCache.java
new file mode 100644
index 00000000..c60d99bc
--- /dev/null
+++ b/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/session/impl/indicator/DistributedPingCache.java
@@ -0,0 +1,187 @@
+/*
+ * Copyright (c) 2021 ETH Zürich, Educational Development and Technology (LET)
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+package ch.ethz.seb.sebserver.webservice.servicelayer.session.impl.indicator;
+
+import static org.mybatis.dynamic.sql.SqlBuilder.isEqualTo;
+import static org.mybatis.dynamic.sql.SqlBuilder.isIn;
+
+import java.util.ArrayList;
+import java.util.Map;
+import java.util.concurrent.ScheduledFuture;
+import java.util.stream.Collectors;
+
+import org.ehcache.impl.internal.concurrent.ConcurrentHashMap;
+import org.joda.time.DateTimeUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.DisposableBean;
+import org.springframework.context.annotation.Lazy;
+import org.springframework.scheduling.TaskScheduler;
+import org.springframework.stereotype.Component;
+import org.springframework.transaction.annotation.Transactional;
+
+import ch.ethz.seb.sebserver.gbl.model.session.ClientEvent.EventType;
+import ch.ethz.seb.sebserver.gbl.profile.WebServiceProfile;
+import ch.ethz.seb.sebserver.webservice.WebserviceInfo;
+import ch.ethz.seb.sebserver.webservice.datalayer.batis.ClientEventLastPingMapper;
+import ch.ethz.seb.sebserver.webservice.datalayer.batis.mapper.ClientEventRecordDynamicSqlSupport;
+import ch.ethz.seb.sebserver.webservice.datalayer.batis.mapper.ClientEventRecordMapper;
+import ch.ethz.seb.sebserver.webservice.datalayer.batis.model.ClientEventRecord;
+
+@Lazy
+@Component
+@WebServiceProfile
+public class DistributedPingCache implements DisposableBean {
+
+ private static final Logger log = LoggerFactory.getLogger(DistributedPingCache.class);
+
+ private final ClientEventLastPingMapper clientEventLastPingMapper;
+ private final ClientEventRecordMapper clientEventRecordMapper;
+ private ScheduledFuture> taskRef;
+
+ private final Map pingCache = new ConcurrentHashMap<>();
+
+ public DistributedPingCache(
+ final ClientEventLastPingMapper clientEventLastPingMapper,
+ final ClientEventRecordMapper clientEventRecordMapper,
+ final WebserviceInfo webserviceInfo,
+ final TaskScheduler taskScheduler) {
+
+ this.clientEventLastPingMapper = clientEventLastPingMapper;
+ this.clientEventRecordMapper = clientEventRecordMapper;
+ if (webserviceInfo.isDistributed()) {
+ try {
+ this.taskRef = taskScheduler.scheduleAtFixedRate(this::updateCache, 1000);
+ } catch (final Exception e) {
+ log.error("Failed to initialize distributed ping cache update task");
+ this.taskRef = null;
+ }
+ } else {
+ this.taskRef = null;
+ }
+ }
+
+ @Transactional
+ public Long initPingForConnection(final Long connectionId) {
+ try {
+ Long recordId = this.clientEventLastPingMapper
+ .pingRecordIdByConnectionId(connectionId);
+
+ if (recordId == null) {
+ final long millisecondsNow = DateTimeUtils.currentTimeMillis();
+ final ClientEventRecord clientEventRecord = new ClientEventRecord();
+ clientEventRecord.setClientConnectionId(connectionId);
+ clientEventRecord.setType(EventType.LAST_PING.id);
+ clientEventRecord.setClientTime(millisecondsNow);
+ clientEventRecord.setServerTime(millisecondsNow);
+ this.clientEventRecordMapper.insert(clientEventRecord);
+
+ recordId = this.clientEventLastPingMapper.pingRecordIdByConnectionId(connectionId);
+ }
+
+ return recordId;
+ } catch (final Exception e) {
+ log.error("Failed to initialize ping for connection -> {}", connectionId, e);
+ return null;
+ }
+ }
+
+ @Transactional
+ public void updatePing(final Long pingRecordId, final Long pingTime) {
+ try {
+
+ this.clientEventLastPingMapper
+ .updatePingTime(pingRecordId, pingTime);
+
+ } catch (final Exception e) {
+ log.error("Failed to update ping for ping record id -> {}", pingRecordId);
+ }
+ }
+
+ @Transactional
+ public void deletePingForConnection(final Long connectionId) {
+ try {
+
+ this.clientEventRecordMapper
+ .deleteByExample()
+ .where(ClientEventRecordDynamicSqlSupport.clientConnectionId, isEqualTo(connectionId))
+ .and(ClientEventRecordDynamicSqlSupport.type, isEqualTo(EventType.LAST_PING.id))
+ .build()
+ .execute();
+
+ } catch (final Exception e) {
+ log.error("Failed to delete ping for connection -> {}", connectionId, e);
+ }
+ }
+
+ public Long getLastPing(final Long pingRecordId) {
+ try {
+ Long ping = this.pingCache.get(pingRecordId);
+ if (ping == null) {
+ log.debug("******* Get and cache ping time: {}", pingRecordId);
+ ping = this.clientEventLastPingMapper.selectPingTimeByPrimaryKey(pingRecordId);
+ if (ping != null) {
+ this.pingCache.put(pingRecordId, ping);
+ }
+ }
+
+ return ping;
+ } catch (final Exception e) {
+ log.error("Error while trying to get last ping from storage: {}", e.getMessage());
+ return 0L;
+ }
+ }
+
+ @Transactional
+ public void updateCache() {
+
+ if (this.pingCache.isEmpty()) {
+ return;
+ }
+
+ log.debug("****** Update distributed ping cache: {}", this.pingCache);
+
+ try {
+ final ArrayList pks = new ArrayList<>(this.pingCache.keySet());
+ final Map mapping = this.clientEventLastPingMapper
+ .selectByExample()
+ .where(
+ ClientEventRecordDynamicSqlSupport.id,
+ isIn(pks))
+ .build()
+ .execute()
+ .stream()
+ .collect(Collectors.toMap(entry -> entry.id, entry -> entry.lastPingTime));
+
+ if (mapping != null) {
+ this.pingCache.clear();
+ this.pingCache.putAll(mapping);
+ }
+
+ } catch (final Exception e) {
+ log.error("Error while trying to update distributed ping cache: {}", this.pingCache, e);
+ }
+ }
+
+ @Override
+ public void destroy() throws Exception {
+ if (this.taskRef != null) {
+ try {
+ final boolean cancel = this.taskRef.cancel(true);
+ if (!cancel) {
+ log.warn("Failed to cancel distributed ping cache update task");
+ }
+ } catch (final Exception e) {
+ log.error("Failed to cancel distributed ping cache update task: ", e);
+ }
+ }
+
+ }
+
+}
diff --git a/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/session/impl/indicator/PingIntervalClientIndicator.java b/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/session/impl/indicator/PingIntervalClientIndicator.java
index c4954a74..85bb95a6 100644
--- a/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/session/impl/indicator/PingIntervalClientIndicator.java
+++ b/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/session/impl/indicator/PingIntervalClientIndicator.java
@@ -26,9 +26,7 @@ import ch.ethz.seb.sebserver.gbl.model.exam.Indicator;
import ch.ethz.seb.sebserver.gbl.model.exam.Indicator.IndicatorType;
import ch.ethz.seb.sebserver.gbl.model.session.ClientEvent;
import ch.ethz.seb.sebserver.gbl.model.session.ClientEvent.EventType;
-import ch.ethz.seb.sebserver.gbl.util.Result;
import ch.ethz.seb.sebserver.webservice.datalayer.batis.model.ClientEventRecord;
-import ch.ethz.seb.sebserver.webservice.servicelayer.dao.ClientEventDAO;
@Lazy
@Component(IndicatorType.Names.LAST_PING)
@@ -46,8 +44,8 @@ public final class PingIntervalClientIndicator extends AbstractPingIndicator {
private boolean missingPing = false;
private boolean hidden = false;
- public PingIntervalClientIndicator(final ClientEventDAO clientEventDAO) {
- super(clientEventDAO);
+ public PingIntervalClientIndicator(final DistributedPingCache distributedPingCache) {
+ super(distributedPingCache);
this.cachingEnabled = true;
}
@@ -129,17 +127,10 @@ public final class PingIntervalClientIndicator extends AbstractPingIndicator {
// if this indicator is not missing ping
if (!this.isMissingPing()) {
-
- final Result lastPing = this.clientEventDAO
- .getLastPing(super.pingRecord.getId());
-
- if (!lastPing.hasError()) {
- if (Double.isNaN(this.currentValue)) {
- return lastPing.get().doubleValue();
- }
- return Math.max(this.currentValue, lastPing.get().doubleValue());
- } else {
- log.error("Failed to get last ping from persistent: {}", lastPing.getError().getMessage());
+ final Long lastPing = this.distributedPingCache.getLastPing(super.pingRecord);
+ if (lastPing != null) {
+ final double doubleValue = lastPing.doubleValue();
+ return Math.max(Double.isNaN(this.currentValue) ? doubleValue : this.currentValue, doubleValue);
}
}
diff --git a/src/main/java/ch/ethz/seb/sebserver/webservice/weblayer/api/ExamAPI_V1_Controller.java b/src/main/java/ch/ethz/seb/sebserver/webservice/weblayer/api/ExamAPI_V1_Controller.java
index bd54c09a..4120f6b1 100644
--- a/src/main/java/ch/ethz/seb/sebserver/webservice/weblayer/api/ExamAPI_V1_Controller.java
+++ b/src/main/java/ch/ethz/seb/sebserver/webservice/weblayer/api/ExamAPI_V1_Controller.java
@@ -270,7 +270,7 @@ public class ExamAPI_V1_Controller {
final String instructionConfirm = request.getParameter(API.EXAM_API_PING_INSTRUCTION_CONFIRM);
if (log.isTraceEnabled()) {
- log.trace("****************** SEB client connection: {} ip: ",
+ log.trace("****************** SEB client connection: {} ip: {}",
connectionToken,
getClientAddress(request));
}
diff --git a/src/main/resources/config/application-dev-ws.properties b/src/main/resources/config/application-dev-ws.properties
index 81ac2bc0..277c15de 100644
--- a/src/main/resources/config/application-dev-ws.properties
+++ b/src/main/resources/config/application-dev-ws.properties
@@ -22,7 +22,7 @@ sebserver.webservice.clean-db-on-startup=false
# webservice configuration
sebserver.init.adminaccount.gen-on-init=false
-sebserver.webservice.distributed=false
+sebserver.webservice.distributed=true
sebserver.webservice.master.delay.threshold=10000
sebserver.webservice.http.external.scheme=http
sebserver.webservice.http.external.servername=localhost
diff --git a/src/test/java/ch/ethz/seb/sebserver/webservice/servicelayer/session/impl/indicator/PingIntervalClientIndicatorTest.java b/src/test/java/ch/ethz/seb/sebserver/webservice/servicelayer/session/impl/indicator/PingIntervalClientIndicatorTest.java
index 1d1b6143..6fbb52b4 100644
--- a/src/test/java/ch/ethz/seb/sebserver/webservice/servicelayer/session/impl/indicator/PingIntervalClientIndicatorTest.java
+++ b/src/test/java/ch/ethz/seb/sebserver/webservice/servicelayer/session/impl/indicator/PingIntervalClientIndicatorTest.java
@@ -33,9 +33,10 @@ public class PingIntervalClientIndicatorTest {
DateTimeUtils.setCurrentMillisProvider(() -> 1L);
final ClientEventDAO clientEventDAO = Mockito.mock(ClientEventDAO.class);
+ final DistributedPingCache distributedPingCache = Mockito.mock(DistributedPingCache.class);
final PingIntervalClientIndicator pingIntervalClientIndicator =
- new PingIntervalClientIndicator(clientEventDAO);
+ new PingIntervalClientIndicator(distributedPingCache);
assertEquals("0.0", String.valueOf(pingIntervalClientIndicator.getValue()));
}
@@ -45,9 +46,10 @@ public class PingIntervalClientIndicatorTest {
DateTimeUtils.setCurrentMillisProvider(() -> 1L);
final ClientEventDAO clientEventDAO = Mockito.mock(ClientEventDAO.class);
+ final DistributedPingCache distributedPingCache = Mockito.mock(DistributedPingCache.class);
final PingIntervalClientIndicator pingIntervalClientIndicator =
- new PingIntervalClientIndicator(clientEventDAO);
+ new PingIntervalClientIndicator(distributedPingCache);
assertEquals("0.0", String.valueOf(pingIntervalClientIndicator.getValue()));
DateTimeUtils.setCurrentMillisProvider(() -> 10L);
@@ -60,9 +62,10 @@ public class PingIntervalClientIndicatorTest {
DateTimeUtils.setCurrentMillisProvider(() -> 1L);
final ClientEventDAO clientEventDAO = Mockito.mock(ClientEventDAO.class);
+ final DistributedPingCache distributedPingCache = Mockito.mock(DistributedPingCache.class);
final PingIntervalClientIndicator pingIntervalClientIndicator =
- new PingIntervalClientIndicator(clientEventDAO);
+ new PingIntervalClientIndicator(distributedPingCache);
final JSONMapper jsonMapper = new JSONMapper();
final String json = jsonMapper.writeValueAsString(pingIntervalClientIndicator);
assertEquals("{\"indicatorValue\":0.0,\"indicatorType\":\"LAST_PING\"}", json);