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Java gateway application sample for asset-transfer-events (#628)

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Co-authored-by: deeptiraom <41100100+deeptiraom@users.noreply.github.com>
Signed-off-by: Mark S. Lewis <mark_lewis@uk.ibm.com>

Co-authored-by: deeptiraom <41100100+deeptiraom@users.noreply.github.com>
This commit is contained in:
Mark S. Lewis 2022-02-09 09:59:14 +00:00 committed by GitHub
parent fee6a44fcd
commit 58606efc06
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
12 changed files with 616 additions and 8 deletions
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4
asset-transfer-events/README.md
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@ -66,6 +66,10 @@ Like other samples, the Fabric test network is used to deploy and run this sampl
cd application-gateway-typescript
npm install
npm start
# To run the Java sample application
cd application-gateway-java
./gradlew run
```
## Clean up

13
asset-transfer-events/application-gateway-go/app.go
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@ -66,7 +66,7 @@ func main() {
}
func startChaincodeEventListening(ctx context.Context, network *client.Network) {
fmt.Printf("\n*** Start chaincode event listening\n")
fmt.Println("\n*** Start chaincode event listening")
events, err := network.ChaincodeEvents(ctx, chaincodeName)
if err != nil {
@ -106,7 +106,7 @@ func createAsset(contract *client.Contract) uint64 {
panic(fmt.Errorf("failed to commit transaction with status code %v", status.Code))
}
fmt.Printf("\n*** CreateAsset committed successfully\n")
fmt.Println("\n*** CreateAsset committed successfully")
return status.BlockNumber
}
@ -119,7 +119,7 @@ func updateAsset(contract *client.Contract) {
panic(fmt.Errorf("failed to submit transaction: %w", err))
}
fmt.Printf("\n*** UpdateAsset committed successfully\n")
fmt.Println("\n*** UpdateAsset committed successfully")
}
func transferAsset(contract *client.Contract) {
@ -130,7 +130,7 @@ func transferAsset(contract *client.Contract) {
panic(fmt.Errorf("failed to submit transaction: %w", err))
}
fmt.Printf("\n*** TransferAsset committed successfully\n")
fmt.Println("\n*** TransferAsset committed successfully")
}
func deleteAsset(contract *client.Contract) {
@ -141,11 +141,11 @@ func deleteAsset(contract *client.Contract) {
panic(fmt.Errorf("failed to submit transaction: %w", err))
}
fmt.Printf("\n*** DeleteAsset committed successfully\n")
fmt.Println("\n*** DeleteAsset committed successfully")
}
func replayChaincodeEvents(ctx context.Context, network *client.Network, startBlock uint64) {
fmt.Printf("\n*** Start chaincode event replay\n")
fmt.Println("\n*** Start chaincode event replay")
events, err := network.ChaincodeEvents(ctx, chaincodeName, client.WithStartBlock(startBlock))
if err != nil {
@ -162,6 +162,7 @@ func replayChaincodeEvents(ctx context.Context, network *client.Network, startBl
fmt.Printf("\n<-- Chaincode event replayed: %s - %s\n", event.EventName, asset)
if event.EventName == "DeleteAsset" {
// Reached the last submitted transaction so return to stop listening for events
return
}
}

20
asset-transfer-events/application-gateway-java/build.gradle Normal file
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@ -0,0 +1,20 @@
plugins {
// Apply the application plugin to add support for building a CLI application.
id 'application'
}
repositories {
mavenCentral()
}
dependencies {
// This dependency is used by the application.
implementation 'org.hyperledger.fabric:fabric-gateway:1.0.0'
implementation 'io.grpc:grpc-netty-shaded:1.42.0'
implementation 'com.google.code.gson:gson:2.8.9'
}
application {
// Define the main class for the application.
mainClass = 'App'
}

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asset-transfer-events/application-gateway-java/gradle/wrapper/gradle-wrapper.jar vendored Normal file
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5
asset-transfer-events/application-gateway-java/gradle/wrapper/gradle-wrapper.properties vendored Normal file
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@ -0,0 +1,5 @@
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-7.3-bin.zip
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists

234
asset-transfer-events/application-gateway-java/gradlew vendored Executable file
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@ -0,0 +1,234 @@
#!/bin/sh
#
# Copyright © 2015-2021 the original authors.
#
# 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
#
# https://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.
#
##############################################################################
#
# Gradle start up script for POSIX generated by Gradle.
#
# Important for running:
#
# (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
# noncompliant, but you have some other compliant shell such as ksh or
# bash, then to run this script, type that shell name before the whole
# command line, like:
#
# ksh Gradle
#
# Busybox and similar reduced shells will NOT work, because this script
# requires all of these POSIX shell features:
# * functions;
# * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
# «${var#prefix}», «${var%suffix}», and «$( cmd )»;
# * compound commands having a testable exit status, especially «case»;
# * various built-in commands including «command», «set», and «ulimit».
#
# Important for patching:
#
# (2) This script targets any POSIX shell, so it avoids extensions provided
# by Bash, Ksh, etc; in particular arrays are avoided.
#
# The "traditional" practice of packing multiple parameters into a
# space-separated string is a well documented source of bugs and security
# problems, so this is (mostly) avoided, by progressively accumulating
# options in "$@", and eventually passing that to Java.
#
# Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
# and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
# see the in-line comments for details.
#
# There are tweaks for specific operating systems such as AIX, CygWin,
# Darwin, MinGW, and NonStop.
#
# (3) This script is generated from the Groovy template
# https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
# within the Gradle project.
#
# You can find Gradle at https://github.com/gradle/gradle/.
#
##############################################################################
# Attempt to set APP_HOME
# Resolve links: $0 may be a link
app_path=$0
# Need this for daisy-chained symlinks.
while
APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path
[ -h "$app_path" ]
do
ls=$( ls -ld "$app_path" )
link=${ls#*' -> '}
case $link in #(
/*) app_path=$link ;; #(
*) app_path=$APP_HOME$link ;;
esac
done
APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
APP_NAME="Gradle"
APP_BASE_NAME=${0##*/}
# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
# Use the maximum available, or set MAX_FD != -1 to use that value.
MAX_FD=maximum
warn () {
echo "$*"
} >&2
die () {
echo
echo "$*"
echo
exit 1
} >&2
# OS specific support (must be 'true' or 'false').
cygwin=false
msys=false
darwin=false
nonstop=false
case "$( uname )" in #(
CYGWIN* ) cygwin=true ;; #(
Darwin* ) darwin=true ;; #(
MSYS* | MINGW* ) msys=true ;; #(
NONSTOP* ) nonstop=true ;;
esac
CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
# Determine the Java command to use to start the JVM.
if [ -n "$JAVA_HOME" ] ; then
if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
# IBM's JDK on AIX uses strange locations for the executables
JAVACMD=$JAVA_HOME/jre/sh/java
else
JAVACMD=$JAVA_HOME/bin/java
fi
if [ ! -x "$JAVACMD" ] ; then
die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
else
JAVACMD=java
which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
# Increase the maximum file descriptors if we can.
if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
case $MAX_FD in #(
max*)
MAX_FD=$( ulimit -H -n ) ||
warn "Could not query maximum file descriptor limit"
esac
case $MAX_FD in #(
'' | soft) :;; #(
*)
ulimit -n "$MAX_FD" ||
warn "Could not set maximum file descriptor limit to $MAX_FD"
esac
fi
# Collect all arguments for the java command, stacking in reverse order:
# * args from the command line
# * the main class name
# * -classpath
# * -D...appname settings
# * --module-path (only if needed)
# * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
# For Cygwin or MSYS, switch paths to Windows format before running java
if "$cygwin" || "$msys" ; then
APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
JAVACMD=$( cygpath --unix "$JAVACMD" )
# Now convert the arguments - kludge to limit ourselves to /bin/sh
for arg do
if
case $arg in #(
-*) false ;; # don't mess with options #(
/?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath
[ -e "$t" ] ;; #(
*) false ;;
esac
then
arg=$( cygpath --path --ignore --mixed "$arg" )
fi
# Roll the args list around exactly as many times as the number of
# args, so each arg winds up back in the position where it started, but
# possibly modified.
#
# NB: a `for` loop captures its iteration list before it begins, so
# changing the positional parameters here affects neither the number of
# iterations, nor the values presented in `arg`.
shift # remove old arg
set -- "$@" "$arg" # push replacement arg
done
fi
# Collect all arguments for the java command;
# * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
# shell script including quotes and variable substitutions, so put them in
# double quotes to make sure that they get re-expanded; and
# * put everything else in single quotes, so that it's not re-expanded.
set -- \
"-Dorg.gradle.appname=$APP_BASE_NAME" \
-classpath "$CLASSPATH" \
org.gradle.wrapper.GradleWrapperMain \
"$@"
# Use "xargs" to parse quoted args.
#
# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
#
# In Bash we could simply go:
#
# readarray ARGS < <( xargs -n1 <<<"$var" ) &&
# set -- "${ARGS[@]}" "$@"
#
# but POSIX shell has neither arrays nor command substitution, so instead we
# post-process each arg (as a line of input to sed) to backslash-escape any
# character that might be a shell metacharacter, then use eval to reverse
# that process (while maintaining the separation between arguments), and wrap
# the whole thing up as a single "set" statement.
#
# This will of course break if any of these variables contains a newline or
# an unmatched quote.
#
eval "set -- $(
printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
xargs -n1 |
sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
tr '\n' ' '
)" '"$@"'
exec "$JAVACMD" "$@"

89
asset-transfer-events/application-gateway-java/gradlew.bat vendored Normal file
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@ -0,0 +1,89 @@
@rem
@rem Copyright 2015 the original author or authors.
@rem
@rem Licensed under the Apache License, Version 2.0 (the "License");
@rem you may not use this file except in compliance with the License.
@rem You may obtain a copy of the License at
@rem
@rem https://www.apache.org/licenses/LICENSE-2.0
@rem
@rem Unless required by applicable law or agreed to in writing, software
@rem distributed under the License is distributed on an "AS IS" BASIS,
@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@rem See the License for the specific language governing permissions and
@rem limitations under the License.
@rem
@if "%DEBUG%" == "" @echo off
@rem ##########################################################################
@rem
@rem Gradle startup script for Windows
@rem
@rem ##########################################################################
@rem Set local scope for the variables with windows NT shell
if "%OS%"=="Windows_NT" setlocal
set DIRNAME=%~dp0
if "%DIRNAME%" == "" set DIRNAME=.
set APP_BASE_NAME=%~n0
set APP_HOME=%DIRNAME%
@rem Resolve any "." and ".." in APP_HOME to make it shorter.
for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
@rem Find java.exe
if defined JAVA_HOME goto findJavaFromJavaHome
set JAVA_EXE=java.exe
%JAVA_EXE% -version >NUL 2>&1
if "%ERRORLEVEL%" == "0" goto execute
echo.
echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.
goto fail
:findJavaFromJavaHome
set JAVA_HOME=%JAVA_HOME:"=%
set JAVA_EXE=%JAVA_HOME%/bin/java.exe
if exist "%JAVA_EXE%" goto execute
echo.
echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.
goto fail
:execute
@rem Setup the command line
set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
@rem Execute Gradle
"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
:end
@rem End local scope for the variables with windows NT shell
if "%ERRORLEVEL%"=="0" goto mainEnd
:fail
rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
rem the _cmd.exe /c_ return code!
if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
exit /b 1
:mainEnd
if "%OS%"=="Windows_NT" endlocal
:omega

10
asset-transfer-events/application-gateway-java/settings.gradle Normal file
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@ -0,0 +1,10 @@
/*
* This file was generated by the Gradle 'init' task.
*
* The settings file is used to specify which projects to include in your build.
*
* Detailed information about configuring a multi-project build in Gradle can be found
* in the user manual at https://docs.gradle.org/6.5/userguide/multi_project_builds.html
*/
rootProject.name = 'application-gateway-java'

163
asset-transfer-events/application-gateway-java/src/main/java/App.java Normal file
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@ -0,0 +1,163 @@
/*
* Copyright IBM Corp. All Rights Reserved.
*
* SPDX-License-Identifier: Apache-2.0
*/
import java.nio.charset.StandardCharsets;
import java.time.Instant;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.TimeUnit;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonElement;
import com.google.gson.JsonParser;
import io.grpc.ManagedChannel;
import org.hyperledger.fabric.client.CallOption;
import org.hyperledger.fabric.client.ChaincodeEvent;
import org.hyperledger.fabric.client.ChaincodeEventsRequest;
import org.hyperledger.fabric.client.CloseableIterator;
import org.hyperledger.fabric.client.CommitException;
import org.hyperledger.fabric.client.CommitStatusException;
import org.hyperledger.fabric.client.Contract;
import org.hyperledger.fabric.client.EndorseException;
import org.hyperledger.fabric.client.Gateway;
import org.hyperledger.fabric.client.Network;
import org.hyperledger.fabric.client.Status;
import org.hyperledger.fabric.client.SubmitException;
import org.hyperledger.fabric.client.SubmittedTransaction;
public final class App {
private static final String channelName = "mychannel";
private static final String chaincodeName = "events";
private final Network network;
private final Contract contract;
private final String assetId = "asset" + Instant.now().toEpochMilli();
private final Gson gson = new GsonBuilder().setPrettyPrinting().create();
public static void main(final String[] args) throws Exception {
ManagedChannel grpcChannel = Connections.newGrpcConnection();
Gateway.Builder builder = Gateway.newInstance()
.identity(Connections.newIdentity())
.signer(Connections.newSigner())
.connection(grpcChannel)
.evaluateOptions(CallOption.deadlineAfter(5, TimeUnit.SECONDS))
.endorseOptions(CallOption.deadlineAfter(15, TimeUnit.SECONDS))
.submitOptions(CallOption.deadlineAfter(5, TimeUnit.SECONDS))
.commitStatusOptions(CallOption.deadlineAfter(1, TimeUnit.MINUTES));
try (Gateway gateway = builder.connect()) {
new App(gateway).run();
} finally {
grpcChannel.shutdownNow().awaitTermination(5, TimeUnit.SECONDS);
}
}
public App(final Gateway gateway) {
network = gateway.getNetwork(channelName);
contract = network.getContract(chaincodeName);
}
public void run() throws EndorseException, SubmitException, CommitStatusException, CommitException {
// Listen for events emitted by subsequent transactions, stopping when the try-with-resources block exits
try (CloseableIterator<ChaincodeEvent> eventSession = startChaincodeEventListening()) {
long firstBlockNumber = createAsset();
updateAsset();
transferAsset();
deleteAsset();
// Replay events from the block containing the first transaction
replayChaincodeEvents(firstBlockNumber);
}
}
private CloseableIterator<ChaincodeEvent> startChaincodeEventListening() {
System.out.println("\n*** Start chaincode event listening");
CloseableIterator<ChaincodeEvent> eventIter = network.getChaincodeEvents(chaincodeName);
CompletableFuture.runAsync(() -> {
eventIter.forEachRemaining(event -> {
String payload = prettyJson(event.getPayload());
System.out.println("\n<-- Chaincode event received: " + event.getEventName() + " - " + payload);
});
});
return eventIter;
}
private String prettyJson(final byte[] json) {
return prettyJson(new String(json, StandardCharsets.UTF_8));
}
private String prettyJson(final String json) {
JsonElement parsedJson = JsonParser.parseString(json);
return gson.toJson(parsedJson);
}
private long createAsset() throws EndorseException, SubmitException, CommitStatusException {
System.out.println("\n--> Submit transaction: CreateAsset, " + assetId + " owned by Sam with appraised value 100");
SubmittedTransaction commit = contract.newProposal("CreateAsset")
.addArguments(assetId, "blue", "10", "Sam", "100")
.build()
.endorse()
.submitAsync();
Status status = commit.getStatus();
if (!status.isSuccessful()) {
throw new RuntimeException("failed to commit transaction with status code " + status.getCode());
}
System.out.println("\n*** CreateAsset committed successfully");
return status.getBlockNumber();
}
private void updateAsset() throws EndorseException, SubmitException, CommitStatusException, CommitException {
System.out.println("\n--> Submit transaction: UpdateAsset, " + assetId + " update appraised value to 200");
contract.submitTransaction("UpdateAsset", assetId, "blue", "10", "Sam", "200");
System.out.println("\n*** UpdateAsset committed successfully");
}
private void transferAsset() throws EndorseException, SubmitException, CommitStatusException, CommitException {
System.out.println("\n--> Submit transaction: TransferAsset, " + assetId + " to Mary");
contract.submitTransaction("TransferAsset", assetId, "Mary");
System.out.println("\n*** TransferAsset committed successfully");
}
private void deleteAsset() throws EndorseException, SubmitException, CommitStatusException, CommitException {
System.out.println("\n--> Submit transaction: DeleteAsset, " + assetId);
contract.submitTransaction("DeleteAsset", assetId);
System.out.println("\n*** DeleteAsset committed successfully");
}
private void replayChaincodeEvents(final long startBlock) {
System.out.println("\n*** Start chaincode event replay");
ChaincodeEventsRequest request = network.newChaincodeEventsRequest(chaincodeName)
.startBlock(startBlock)
.build();
try (CloseableIterator<ChaincodeEvent> eventIter = request.getEvents()) {
while (eventIter.hasNext()) {
ChaincodeEvent event = eventIter.next();
String payload = prettyJson(event.getPayload());
System.out.println("\n<-- Chaincode event replayed: " + event.getEventName() + " - " + payload);
if (event.getEventName().equals("DeleteAsset")) {
// Reached the last submitted transaction so break to close the iterator and stop listening for events
break;
}
}
}
}
}

71
asset-transfer-events/application-gateway-java/src/main/java/Connections.java Normal file
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@ -0,0 +1,71 @@
/*
* Copyright IBM Corp. All Rights Reserved.
*
* SPDX-License-Identifier: Apache-2.0
*/
import java.io.IOException;
import java.io.Reader;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.security.InvalidKeyException;
import java.security.PrivateKey;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import io.grpc.ManagedChannel;
import io.grpc.netty.shaded.io.grpc.netty.GrpcSslContexts;
import io.grpc.netty.shaded.io.grpc.netty.NettyChannelBuilder;
import org.hyperledger.fabric.client.identity.Identities;
import org.hyperledger.fabric.client.identity.Identity;
import org.hyperledger.fabric.client.identity.Signer;
import org.hyperledger.fabric.client.identity.Signers;
import org.hyperledger.fabric.client.identity.X509Identity;
public final class Connections {
// Path to crypto materials.
private static final Path cryptoPath = Paths.get("..", "..", "test-network", "organizations", "peerOrganizations", "org1.example.com");
// Path to user certificate.
private static final Path certPath = cryptoPath.resolve(Paths.get("users", "User1@org1.example.com", "msp", "signcerts", "cert.pem"));
// Path to user private key directory.
private static final Path keyDirPath = cryptoPath.resolve(Paths.get("users", "User1@org1.example.com", "msp", "keystore"));
// Path to peer tls certificate.
private static final Path tlsCertPath = cryptoPath.resolve(Paths.get("peers", "peer0.org1.example.com", "tls", "ca.crt"));
// Gateway peer end point.
private static final String peerEndpoint = "localhost:7051";
private static final String overrideAuth = "peer0.org1.example.com";
private static final String mspID = "Org1MSP";
private Connections() {
// Private constructor to prevent instantiation
}
public static ManagedChannel newGrpcConnection() throws IOException, CertificateException {
Reader tlsCertReader = Files.newBufferedReader(tlsCertPath);
X509Certificate tlsCert = Identities.readX509Certificate(tlsCertReader);
return NettyChannelBuilder.forTarget(peerEndpoint)
.sslContext(GrpcSslContexts.forClient().trustManager(tlsCert).build()).overrideAuthority(overrideAuth)
.build();
}
public static Identity newIdentity() throws IOException, CertificateException {
Reader certReader = Files.newBufferedReader(certPath);
X509Certificate certificate = Identities.readX509Certificate(certReader);
return new X509Identity(mspID, certificate);
}
public static Signer newSigner() throws IOException, InvalidKeyException {
Path keyPath = Files.list(keyDirPath)
.findFirst()
.orElseThrow();
Reader keyReader = Files.newBufferedReader(keyPath);
PrivateKey privateKey = Identities.readPrivateKey(keyReader);
return Signers.newPrivateKeySigner(privateKey);
}
}

6
asset-transfer-events/application-gateway-typescript/src/app.ts
View file

@ -134,8 +134,9 @@ async function deleteAssetByID(contract: Contract): Promise<void>{
console.log('\n*** DeleteAsset committed successfully');
}
async function replayChaincodeEvents(network: Network, startBlock: bigint): Promise<void>{
async function replayChaincodeEvents(network: Network, startBlock: bigint): Promise<void> {
console.log('\n*** Start chaincode event replay');
const events = await network.getChaincodeEvents(chaincodeName, {
startBlock,
});
@ -146,6 +147,7 @@ async function replayChaincodeEvents(network: Network, startBlock: bigint): Prom
console.log(`\n<-- Chaincode event replayed: ${event.eventName} -`, payload);
if (event.eventName === 'DeleteAsset') {
// Reached the last submitted transaction so break to stop listening for events
break;
}
}

9
ci/scripts/run-test-network-events.sh
View file

@ -56,3 +56,12 @@ print "Executing application"
go run .
popd
stopNetwork
# Run Java gateway application
createNetwork
print "Initializing Java gateway application"
pushd ../asset-transfer-events/application-gateway-java
print "Executing application"
./gradlew run
popd
stopNetwork