/
DatabaseClientImpl.java
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/
DatabaseClientImpl.java
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/*
* Copyright 2017 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.cloud.spanner;
import com.google.cloud.Timestamp;
import com.google.cloud.spanner.SessionPool.PooledSessionFuture;
import com.google.cloud.spanner.SpannerImpl.ClosedException;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Function;
import com.google.common.util.concurrent.ListenableFuture;
import io.opencensus.common.Scope;
import io.opencensus.trace.Span;
import io.opencensus.trace.Tracer;
import io.opencensus.trace.Tracing;
class DatabaseClientImpl implements DatabaseClient {
private static final String READ_WRITE_TRANSACTION = "CloudSpanner.ReadWriteTransaction";
private static final String READ_ONLY_TRANSACTION = "CloudSpanner.ReadOnlyTransaction";
private static final String PARTITION_DML_TRANSACTION = "CloudSpanner.PartitionDMLTransaction";
private static final Tracer tracer = Tracing.getTracer();
@VisibleForTesting final String clientId;
@VisibleForTesting final SessionPool pool;
@VisibleForTesting
DatabaseClientImpl(SessionPool pool) {
this("", pool);
}
DatabaseClientImpl(String clientId, SessionPool pool) {
this.clientId = clientId;
this.pool = pool;
}
@VisibleForTesting
PooledSessionFuture getSession() {
return pool.getSession();
}
@Override
public Timestamp write(final Iterable<Mutation> mutations) throws SpannerException {
Span span = tracer.spanBuilder(READ_WRITE_TRANSACTION).startSpan();
try (Scope s = tracer.withSpan(span)) {
return runWithSessionRetry(
new Function<Session, Timestamp>() {
@Override
public Timestamp apply(Session session) {
return session.write(mutations);
}
});
} catch (RuntimeException e) {
TraceUtil.setWithFailure(span, e);
throw e;
} finally {
span.end(TraceUtil.END_SPAN_OPTIONS);
}
}
@Override
public Timestamp writeAtLeastOnce(final Iterable<Mutation> mutations) throws SpannerException {
Span span = tracer.spanBuilder(READ_WRITE_TRANSACTION).startSpan();
try (Scope s = tracer.withSpan(span)) {
return runWithSessionRetry(
new Function<Session, Timestamp>() {
@Override
public Timestamp apply(Session session) {
return session.writeAtLeastOnce(mutations);
}
});
} catch (RuntimeException e) {
TraceUtil.setWithFailure(span, e);
throw e;
} finally {
span.end(TraceUtil.END_SPAN_OPTIONS);
}
}
@Override
public ReadContext singleUse() {
Span span = tracer.spanBuilder(READ_ONLY_TRANSACTION).startSpan();
try (Scope s = tracer.withSpan(span)) {
return getSession().singleUse();
} catch (RuntimeException e) {
TraceUtil.endSpanWithFailure(span, e);
throw e;
}
}
@Override
public ReadContext singleUse(TimestampBound bound) {
Span span = tracer.spanBuilder(READ_ONLY_TRANSACTION).startSpan();
try (Scope s = tracer.withSpan(span)) {
return getSession().singleUse(bound);
} catch (RuntimeException e) {
TraceUtil.endSpanWithFailure(span, e);
throw e;
}
}
@Override
public ReadOnlyTransaction singleUseReadOnlyTransaction() {
Span span = tracer.spanBuilder(READ_ONLY_TRANSACTION).startSpan();
try (Scope s = tracer.withSpan(span)) {
return getSession().singleUseReadOnlyTransaction();
} catch (RuntimeException e) {
TraceUtil.endSpanWithFailure(span, e);
throw e;
}
}
@Override
public ReadOnlyTransaction singleUseReadOnlyTransaction(TimestampBound bound) {
Span span = tracer.spanBuilder(READ_ONLY_TRANSACTION).startSpan();
try (Scope s = tracer.withSpan(span)) {
return getSession().singleUseReadOnlyTransaction(bound);
} catch (RuntimeException e) {
TraceUtil.endSpanWithFailure(span, e);
throw e;
}
}
@Override
public ReadOnlyTransaction readOnlyTransaction() {
Span span = tracer.spanBuilder(READ_ONLY_TRANSACTION).startSpan();
try (Scope s = tracer.withSpan(span)) {
return getSession().readOnlyTransaction();
} catch (RuntimeException e) {
TraceUtil.endSpanWithFailure(span, e);
throw e;
}
}
@Override
public ReadOnlyTransaction readOnlyTransaction(TimestampBound bound) {
Span span = tracer.spanBuilder(READ_ONLY_TRANSACTION).startSpan();
try (Scope s = tracer.withSpan(span)) {
return getSession().readOnlyTransaction(bound);
} catch (RuntimeException e) {
TraceUtil.endSpanWithFailure(span, e);
throw e;
}
}
@Override
public TransactionRunner readWriteTransaction() {
Span span = tracer.spanBuilder(READ_WRITE_TRANSACTION).startSpan();
try (Scope s = tracer.withSpan(span)) {
return getSession().readWriteTransaction();
} catch (RuntimeException e) {
TraceUtil.endSpanWithFailure(span, e);
throw e;
} finally {
span.end(TraceUtil.END_SPAN_OPTIONS);
}
}
@Override
public TransactionManager transactionManager() {
Span span = tracer.spanBuilder(READ_WRITE_TRANSACTION).startSpan();
try (Scope s = tracer.withSpan(span)) {
return getSession().transactionManager();
} catch (RuntimeException e) {
TraceUtil.endSpanWithFailure(span, e);
throw e;
}
}
@Override
public AsyncRunner runAsync() {
Span span = tracer.spanBuilder(READ_WRITE_TRANSACTION).startSpan();
try (Scope s = tracer.withSpan(span)) {
return getSession().runAsync();
} catch (RuntimeException e) {
TraceUtil.endSpanWithFailure(span, e);
throw e;
}
}
@Override
public AsyncTransactionManager transactionManagerAsync() {
Span span = tracer.spanBuilder(READ_WRITE_TRANSACTION).startSpan();
try (Scope s = tracer.withSpan(span)) {
return getSession().transactionManagerAsync();
} catch (RuntimeException e) {
TraceUtil.endSpanWithFailure(span, e);
throw e;
}
}
@Override
public long executePartitionedUpdate(final Statement stmt) {
Span span = tracer.spanBuilder(PARTITION_DML_TRANSACTION).startSpan();
try (Scope s = tracer.withSpan(span)) {
return runWithSessionRetry(
new Function<Session, Long>() {
@Override
public Long apply(Session session) {
return session.executePartitionedUpdate(stmt);
}
});
} catch (RuntimeException e) {
TraceUtil.endSpanWithFailure(span, e);
throw e;
}
}
private <T> T runWithSessionRetry(Function<Session, T> callable) {
PooledSessionFuture session = getSession();
while (true) {
try {
return callable.apply(session);
} catch (SessionNotFoundException e) {
session = pool.replaceSession(e, session);
}
}
}
ListenableFuture<Void> closeAsync(ClosedException closedException) {
return pool.closeAsync(closedException);
}
}